{"id":133,"date":"2018-02-21T17:40:18","date_gmt":"2018-02-21T17:40:18","guid":{"rendered":"https:\/\/grgrebuildstg.wpenginepowered.com\/design\/overarching-standards\/"},"modified":"2026-01-22T15:23:18","modified_gmt":"2026-01-22T21:23:18","slug":"overarching-standards","status":"publish","type":"page","link":"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/overarching-standards\/","title":{"rendered":"Overarching Standards for Greenway Development"},"content":{"rendered":"<div id=\"mega-menu-wrap-max_mega_menu_1\" class=\"mega-menu-wrap\"><div class=\"mega-menu-toggle\"><div class=\"mega-toggle-blocks-left\"><\/div><div class=\"mega-toggle-blocks-center\"><\/div><div class=\"mega-toggle-blocks-right\"><div class='mega-toggle-block mega-menu-toggle-animated-block mega-toggle-block-0' id='mega-toggle-block-0'><button aria-controls=\"mega-menu-max_mega_menu_1\" aria-expanded=\"false\" aria-haspopup=\"true\" aria-label=\"Toggle Menu\" 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href=\"https:\/\/greatriversgreenway.org\/design\/\">Home<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-has-children mega-align-bottom-left mega-menu-flyout mega-hide-arrow mega-menu-item-539\" id=\"mega-menu-item-539\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/overview\/\" aria-expanded=\"false\" aria-controls=\"mega-sub-menu-539\">Overview<span class=\"mega-indicator\" aria-hidden=\"true\"><\/span><\/a>\n<ul class=\"mega-sub-menu\" id='mega-sub-menu-539'>\n<li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-540\" id=\"mega-menu-item-540\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/overview\/development\/\">Guideline Process<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-541\" id=\"mega-menu-item-541\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/overview\/goals\/\">Guideline Goals<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-982\" id=\"mega-menu-item-982\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/greenway-usage-recommendations\/\">Usage Recommendations<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-542\" id=\"mega-menu-item-542\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/overview\/user\/\">Designing for the User<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-543\" id=\"mega-menu-item-543\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/overview\/safety\/\">Safety and Security<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-544\" id=\"mega-menu-item-544\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/overview\/standard-flexible\/\">What is Standard and Flexible<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-545\" id=\"mega-menu-item-545\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/overview\/mindset\/\">Design Mindset<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-546\" id=\"mega-menu-item-546\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/overview\/recognizable\/\">Make Greenways Recognizable<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-547\" id=\"mega-menu-item-547\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/overview\/pre-design\/\">Pre-Design Evaluation<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-custom mega-menu-item-object-custom mega-menu-item-548\" id=\"mega-menu-item-548\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/wp-content\/uploads\/sites\/2\/2024\/11\/GRG-Construction-Plans-Checklist-and-Deviation-Form.pdf\">Design\/Construction Plans Checklist<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-549\" id=\"mega-menu-item-549\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/overview\/additional-design-resources\/\">Onboarding Resources<\/a><\/li><\/ul>\n<\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-has-children mega-align-bottom-left mega-menu-flyout mega-hide-arrow mega-menu-item-550\" id=\"mega-menu-item-550\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/\" aria-expanded=\"false\" aria-controls=\"mega-sub-menu-550\">Trail Design Guidelines<span class=\"mega-indicator\" aria-hidden=\"true\"><\/span><\/a>\n<ul class=\"mega-sub-menu\" id='mega-sub-menu-550'>\n<li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-551\" id=\"mega-menu-item-551\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/overarching-standards\/\">Overarching Standards<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-552\" id=\"mega-menu-item-552\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/shoulder-standards\/\">Trail Shoulder Standards<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-553\" id=\"mega-menu-item-553\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/layout-standards\/\">Layout Standards<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-has-children mega-menu-item-566\" id=\"mega-menu-item-566\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/cross-sections\/\" aria-expanded=\"false\" aria-controls=\"mega-sub-menu-566\">Greenway Cross Sections<span class=\"mega-indicator\" aria-hidden=\"true\"><\/span><\/a>\n\t<ul class=\"mega-sub-menu\" id='mega-sub-menu-566'>\n<li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-554\" id=\"mega-menu-item-554\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/standard-cross-section\/\">Standard Trail<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-555\" id=\"mega-menu-item-555\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/wet-flood\/\">Trail in Wet\/Flood Prone Areas<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-556\" id=\"mega-menu-item-556\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/shallow-slope\/\">Trail on Shallow Slope<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-557\" id=\"mega-menu-item-557\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/steep-slope\/\">Trail on Steep Slope<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-558\" id=\"mega-menu-item-558\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/roadway\/\">Trail by Roadway<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-559\" id=\"mega-menu-item-559\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/urban\/\">Trail in Urban Context<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-560\" id=\"mega-menu-item-560\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/boardwalk\/\">Boardwalk Trail<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-561\" id=\"mega-menu-item-561\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/underpass\/\">Trail at Bridge Underpass<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-562\" id=\"mega-menu-item-562\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/railway\/\">Trail Adjacent to Railway<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-563\" id=\"mega-menu-item-563\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/standard-cross-section-secondary-path\/\">Secondary Path<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-567\" id=\"mega-menu-item-567\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/neighborhood\/\">Trail through Neighborhood<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-564\" id=\"mega-menu-item-564\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/stream\/\">Trail Adjacent to Stream<\/a><\/li>\t<\/ul>\n<\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-has-children mega-menu-item-568\" id=\"mega-menu-item-568\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/intersections-and-crossings\/\" aria-expanded=\"false\" aria-controls=\"mega-sub-menu-568\">Intersections and Crossings<span class=\"mega-indicator\" aria-hidden=\"true\"><\/span><\/a>\n\t<ul class=\"mega-sub-menu\" id='mega-sub-menu-568'>\n<li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-570\" id=\"mega-menu-item-570\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/major-intersection\/\">Major Intersection with Bike Lane<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-569\" id=\"mega-menu-item-569\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/greenway-major-intersection-turn-recommended-layout\/\">Major Intersection with Turn<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-571\" id=\"mega-menu-item-571\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/mid-block\/\">Major Street Mid-Block<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-578\" id=\"mega-menu-item-578\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/minor-mid-block\/\">Minor Street Mid-Block<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-577\" id=\"mega-menu-item-577\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/minor-mid-block-parking\/\">Minor Street Mid-Block with Parking<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-579\" id=\"mega-menu-item-579\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/mid-block-crossing-angled-pedestrian-refuge\/\">Mid-Block Crossing - Angled Pedestrian Refuge<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-580\" id=\"mega-menu-item-580\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/minor-street-t\/\">Minor Street T-Intersection<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-582\" id=\"mega-menu-item-582\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/major-trail\/\">Major Trail Connection<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-581\" id=\"mega-menu-item-581\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/minor-trail-connection-standard-layout\/\">Minor Trail Connection<\/a><\/li>\t<\/ul>\n<\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-has-children mega-menu-item-734\" id=\"mega-menu-item-734\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/trail-nodes\/\" aria-expanded=\"false\" aria-controls=\"mega-sub-menu-734\">Trail Nodes<span class=\"mega-indicator\" aria-hidden=\"true\"><\/span><\/a>\n\t<ul class=\"mega-sub-menu\" id='mega-sub-menu-734'>\n<li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-733\" id=\"mega-menu-item-733\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/major-trailhead-recommended-layout\/\">Major Trailhead - Recommended Layout<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-735\" id=\"mega-menu-item-735\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/minor-trailhead\/\">Minor Trailhead - Recommended Layout<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-737\" id=\"mega-menu-item-737\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/gateways\/\">Gateway - Recommended Layout<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-736\" id=\"mega-menu-item-736\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/greenway-intersection\/\">Major Greenway Intersection - Recommended Layout<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-739\" id=\"mega-menu-item-739\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/seating-node\/\">Large Seating Node - Recommended Layout<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-738\" id=\"mega-menu-item-738\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/small-seating-nodes\/\">Small Seating Node - Recommended Layout<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-740\" id=\"mega-menu-item-740\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/bicycle-parking\/\">Bicycle Parking - Recommended Layout<\/a><\/li>\t<\/ul>\n<\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-has-children mega-menu-item-746\" id=\"mega-menu-item-746\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/surfacing\/\" aria-expanded=\"false\" aria-controls=\"mega-sub-menu-746\">Surfacing<span class=\"mega-indicator\" aria-hidden=\"true\"><\/span><\/a>\n\t<ul class=\"mega-sub-menu\" id='mega-sub-menu-746'>\n<li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-742\" id=\"mega-menu-item-742\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/surfacing-primary-trail\/\">Surfacing Standards - Primary Trail<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-741\" id=\"mega-menu-item-741\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/surfacing-secondary-path\/\">Surfacing Standards - Secondary Path<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-744\" id=\"mega-menu-item-744\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/surfacing-standards-roadway-service-drives\/\">Surfacing Standards - Roadway \/ Service Drives<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-745\" id=\"mega-menu-item-745\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/specialty-pavements\/\">Surfacing Basis of Design - Specialty Pavements<\/a><\/li>\t<\/ul>\n<\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-has-children mega-menu-item-747\" id=\"mega-menu-item-747\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/trail-structures-furnishings\/\" aria-expanded=\"false\" aria-controls=\"mega-sub-menu-747\">Trail Structures & Furnishings<span class=\"mega-indicator\" aria-hidden=\"true\"><\/span><\/a>\n\t<ul class=\"mega-sub-menu\" id='mega-sub-menu-747'>\n<li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-748\" id=\"mega-menu-item-748\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/masonry-walls-seat-walls-retaining-walls-recommendations\/\">Masonry Walls, Seat Walls, Retaining Walls - Recommendations<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-749\" id=\"mega-menu-item-749\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/modular-concrete-masonry-unit-walls-recommendations\/\">Modular and Concrete Masonry Unit Walls - Recommendations<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-750\" id=\"mega-menu-item-750\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/concrete-stem-wall-recommendations\/\">Concrete Stem Wall - Recommendations<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-751\" id=\"mega-menu-item-751\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/boulder-ledge-rock-walls\/\">Boulder \/ Ledge Rock Wall - Recommendations<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-752\" id=\"mega-menu-item-752\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/bridges-landings\/\">Bridges & Landings<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-753\" id=\"mega-menu-item-753\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/bridge-abutment-standards\/\">Bridge Abutment - Standards<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-754\" id=\"mega-menu-item-754\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/shelters-pavilions\/\">Shelters \/ Pavilions - Recommendations<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-755\" id=\"mega-menu-item-755\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/handrails-basis-design\/\">Handrails - Basis of Design<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-756\" id=\"mega-menu-item-756\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/fencing\/\">Fencing - Basis of Design<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-757\" id=\"mega-menu-item-757\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/contemporary-furnishings\/\">Contemporary Furnishings - Recommendations<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-758\" id=\"mega-menu-item-758\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/historic-furnishings\/\">Historic Furnishings - Recommendations<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-759\" id=\"mega-menu-item-759\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/transitional-furnishings\/\">Transitional Furnishings - Recommendations<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-760\" id=\"mega-menu-item-760\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/trail-design\/drinking-fountain-install\/\">Drinking Fountain - Installation Detail<\/a><\/li>\t<\/ul>\n<\/li><\/ul>\n<\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-has-children mega-align-bottom-left mega-menu-flyout mega-hide-arrow mega-menu-item-573\" id=\"mega-menu-item-573\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/\" aria-expanded=\"false\" aria-controls=\"mega-sub-menu-573\">Environmental Design Guidlines<span class=\"mega-indicator\" aria-hidden=\"true\"><\/span><\/a>\n<ul class=\"mega-sub-menu\" id='mega-sub-menu-573'>\n<li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-has-children mega-menu-item-761\" id=\"mega-menu-item-761\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/stormwater-grading-considerations\/\" aria-expanded=\"false\" aria-controls=\"mega-sub-menu-761\">Stormwater and Grading Considerations<span class=\"mega-indicator\" aria-hidden=\"true\"><\/span><\/a>\n\t<ul class=\"mega-sub-menu\" id='mega-sub-menu-761'>\n<li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-762\" id=\"mega-menu-item-762\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/stormwater-bmp-selection-recommendations\/\">Stormwater BMP Selection Recommendations<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-763\" id=\"mega-menu-item-763\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/bioretention-raingarden\/\">Bioretention \u2013 Rain Garden \u2013 Recommendations<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-764\" id=\"mega-menu-item-764\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/standard-cross-section-trail-bmp\/\">Standard Cross Section - Trail with BMP<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-765\" id=\"mega-menu-item-765\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/permeable-pavement\/\">Permeable Pavement- Recommendations<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-766\" id=\"mega-menu-item-766\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/amended-soils-disconnection-recommendations\/\">Amended Soils Disconnection- Recommendations<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-767\" id=\"mega-menu-item-767\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/ponds-wetlands\/\">Stormwater Ponds and Wetlands- recommendations<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-768\" id=\"mega-menu-item-768\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/bioretention-stormwater-control-swales-recommendations\/\">Bioretention \u2013 Stormwater Control Swales-  Recommendations<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-769\" id=\"mega-menu-item-769\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/temporary-bank-stabilization-strategies\/\">Temporary Bank Stabilization Strategies<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-770\" id=\"mega-menu-item-770\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/permanent-bank-stabilization\/\">Permanent Bank Stabilization Recommendations<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-771\" id=\"mega-menu-item-771\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/stream-stabilization-techniques\/\">In-Stream Stabilization Techniques<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-772\" id=\"mega-menu-item-772\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/culverts-piping-standards\/\">Culverts and Piping \u2013 Standards<\/a><\/li>\t<\/ul>\n<\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-has-children mega-menu-item-773\" id=\"mega-menu-item-773\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/trail-planting-guidelines\/\" aria-expanded=\"false\" aria-controls=\"mega-sub-menu-773\">Trail Planting Guidelines<span class=\"mega-indicator\" aria-hidden=\"true\"><\/span><\/a>\n\t<ul class=\"mega-sub-menu\" id='mega-sub-menu-773'>\n<li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-790\" id=\"mega-menu-item-790\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/planting-vision-goals\/\">Planting Vision & Goals<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-791\" id=\"mega-menu-item-791\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/planting-anatomy\/\">Planting Anatomy<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-792\" id=\"mega-menu-item-792\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/recommended-matrix-planting-strategies\/\">Recommended Matrix of Planting Strategies<\/a><\/li>\t<\/ul>\n<\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-has-children mega-menu-item-775\" id=\"mega-menu-item-775\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/typical-planting-design\/\" aria-expanded=\"false\" aria-controls=\"mega-sub-menu-775\">Typical Planting Design<span class=\"mega-indicator\" aria-hidden=\"true\"><\/span><\/a>\n\t<ul class=\"mega-sub-menu\" id='mega-sub-menu-775'>\n<li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-776\" id=\"mega-menu-item-776\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/soil-preparation\/\">Soil Preparation<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-777\" id=\"mega-menu-item-777\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/standard-turf-shoulder\/\">Standard Turf Shoulder<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-778\" id=\"mega-menu-item-778\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/recommendations-turf-lawn-high-mow-lawn\/\">Recommendations for Turf Lawn \/ High Mow Lawn<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-779\" id=\"mega-menu-item-779\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/native-grassland-planting\/\">Recommendations for Native Grassland Planting<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-780\" id=\"mega-menu-item-780\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/recommendations-native-shrub-perennial-beds\/\">Recommendations for Native Shrub and Perennial Beds<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-781\" id=\"mega-menu-item-781\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/recommendations-woodland-forest-planting\/\">Recommendations for Woodland \/ Forest Planting<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-782\" id=\"mega-menu-item-782\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/streambank-planting\/\">Recommendations for Streambank Planting<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-783\" id=\"mega-menu-item-783\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/wetland-pond-edge-planting\/\">Recommendations for Wetland \/ Pond Edge Planning<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-784\" id=\"mega-menu-item-784\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/bioretention-rain-garden\/\">Recommendations for Bioretention \/ Rain Garden<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-has-children mega-menu-item-785\" id=\"mega-menu-item-785\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/tree-planting\/\" aria-expanded=\"false\" aria-controls=\"mega-sub-menu-785\">Standards for Tree Planting<span class=\"mega-indicator\" aria-hidden=\"true\"><\/span><\/a>\n\t\t<ul class=\"mega-sub-menu\" id='mega-sub-menu-785'>\n<li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-786\" id=\"mega-menu-item-786\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/standards-tree-planting-root-barriers\/\">Root Barriers<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-787\" id=\"mega-menu-item-787\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/standards-tree-planting-soil-volume-tree-health\/\">Soil Volume for Tree Health<\/a><\/li>\t\t<\/ul>\n<\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-788\" id=\"mega-menu-item-788\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/tree-staking\/\">Standards for Tree Staking<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-789\" id=\"mega-menu-item-789\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/shrubs-ornamental-grasses-perennials\/\">Shrubs, Ornamental Grasses, & Perennials<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-793\" id=\"mega-menu-item-793\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/environmental\/bed-edges\/\">Recommendations for Bed Edges<\/a><\/li>\t<\/ul>\n<\/li><\/ul>\n<\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-has-children mega-align-bottom-left mega-menu-flyout mega-hide-arrow mega-menu-item-574\" id=\"mega-menu-item-574\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/construction\/\" aria-expanded=\"false\" aria-controls=\"mega-sub-menu-574\">Pre-Construction & Construction<span class=\"mega-indicator\" aria-hidden=\"true\"><\/span><\/a>\n<ul class=\"mega-sub-menu\" id='mega-sub-menu-574'>\n<li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-799\" id=\"mega-menu-item-799\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/required-front-end-drawings-addition-design-drawings\/\">Required Front End Drawings (In Addition to Design Drawings)<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-795\" id=\"mega-menu-item-795\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/construction\/erosion-control-stormwater-pollution-prevention-plan-swppp\/\">Erosion control and stormwater pollution prevention plan (SWPPP)<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-796\" id=\"mega-menu-item-796\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/construction\/testing-quality-assurance\/\">During Construction \u2013 Testing & Quality Assurance<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-797\" id=\"mega-menu-item-797\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/construction\/construction-mock-ups\/\">During Construction \u2013 Mockups<\/a><\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-798\" id=\"mega-menu-item-798\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/construction\/construction-checkpoints\/\">During Construction \u2013 Checkpoints<\/a><\/li><\/ul>\n<\/li><li class=\"mega-menu-item mega-menu-item-type-post_type mega-menu-item-object-page mega-menu-item-587\" id=\"mega-menu-item-587\"><a class=\"mega-menu-link\" href=\"https:\/\/greatriversgreenway.org\/design\/design-guidelines\/overview\/additional-design-resources\/\">Onboarding Resources<\/a><\/li><\/ul><\/div>\n<h4>While the design guidelines are an outline for the development for GRG greenway facilities, design and implementation are governed by a series of standards which need to be consulted for each greenway project.<\/h4>\n<p><strong> The following standards need to be consulted and are adopted by reference. Local laws, ordinances, and codes should always be consulted for guidance.<\/strong><\/p>\n<p style=\"padding-left: 30px\"><strong><img loading=\"lazy\" decoding=\"async\" class=\"alignright wp-image-6494\" src=\"https:\/\/greatriversgreenway.org\/design\/wp-content\/uploads\/sites\/2\/2024\/05\/low-angle-greenway.png\" alt=\"\" width=\"459\" height=\"432\" \/>AASHTO<\/strong><br \/>\nThe American Association of State Highway and Transportation Officials (AASHTO) is a standards setting body which publishes specifications, test protocols, and guidelines which are used in highway design and construction throughout the United States. Despite its name, the association represents not only highways, but air, rail, water and public transportation as well.<\/p>\n<p style=\"padding-left: 30px\"><strong>ADA<\/strong><br \/>\nThe Americans with Disabilities Act (ADA) of 1990 is a civil rights law that prohibits discrimination based on disability. The ADA also require covered employers to provide reasonable accommodations to employees with disabilities, and imposes accessibility requirements on public accommodations.<\/p>\n<p style=\"padding-left: 30px\"><strong>MUTCD<\/strong><br \/>\nThe Manual on Uniform Traffic Control Devices (MUTCD) is a document issued by the Federal Highway Administration (FHWA) of the United States Department of Transportation to specify the standards by which traffic signs, road surface markings, and signals are designed, installed and used. These specifications include the shapes, colors, and fonts used in road markings and signs. All traffic control devices in the United States must legally conform to these standards.<\/p>\n<p style=\"padding-left: 30px\"><strong>NACTO<\/strong><br \/>\nThe National Association of City Transportation Officials (NACTO) is a coalition of the Departments of Transportation in North American cities. NACTO\u2019s mission is a commitment to \u201craising the state of the practice for street design and transportation by building a common vision, sharing data, peer-to-peer exchange in workshops and conferences, and regular communication among member cities.\u201d<\/p>\n<p style=\"padding-left: 30px\"><strong>NACTO Urban Bikeway Design Guide<\/strong><br \/>\nThe purpose of this guide is to provide cities and municipalities with state-of-the-practice solutions that can help create complete streets safe and enjoyable for bicyclists.<\/p>\n<p style=\"padding-left: 30px\"><strong>PROWAG<\/strong><br \/>\nAccessibility Guidelines for Pedestrian Facilities in the Public Right-of-Way (PROWAG) addresses design and construction of facilities in the public right-of-way and build off of the most recent accessibility guidelines, the 2004 ADA Accessibility Guidelines (ADAAG) which does not fully address public rights-of-way. These guidelines are not yet published, as the Access Board works to incorporate public comments; they anticipate PROWAG to be finalized in 2017. However, some states have begun incorporating the guidelines into their own accessibility laws.<\/p>\n<p style=\"padding-left: 30px\"><strong>MSD<\/strong><br \/>\nThe Metropolitan St. Louis Sewer District (MSD) provides sewer collection, pumping, and treatment services within three major watersheds located within the MSD\u2019s service area: the Mississippi River watershed, the Missouri River watershed and the Meramec River watershed. Any GRG project that falls outside of MSD\u2019s geographical jurisdiction should meet the same standards as those within.<\/p>\n<hr \/>\n<h4>A thorough review of national and local regulations served as the basis of the trail design standards below.<\/h4>\n<p><strong>These standards should be followed for all trail and secondary path development. More in depth standards for trail shoulder treatment are outlined in the Trail Shoulder Standards.<\/strong><\/p>\n<table cellspacing=\"0\">\n<tbody>\n<tr>\n<td style=\"text-align: left;vertical-align: top\"><\/td>\n<td style=\"width: 17%;text-align: left;vertical-align: top\"><strong>AASHTO<\/strong><\/td>\n<td style=\"width: 17%;text-align: left;vertical-align: top\"><strong>ADA<\/strong><\/td>\n<td style=\"width: 17%;text-align: left;vertical-align: top\"><strong>PROWAG<\/strong><\/td>\n<td style=\"width: 17%;text-align: left;vertical-align: top\"><strong>GRG Standard<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;vertical-align: top\" rowspan=\"3\" valign=\"middle\"><strong>Minimum width: Shared use Path<\/strong><\/td>\n<td style=\"text-align: left;vertical-align: top\">10\u2019-0\u201d Recommended.<\/td>\n<td style=\"text-align: left;vertical-align: top\">4\u2019-0\u201d Min. (one way)<\/td>\n<td style=\"text-align: left;vertical-align: top\">4\u2019-0\u201d Min. clear<\/td>\n<td style=\"text-align: left;vertical-align: top\">12\u2019 wide typical trail section<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;vertical-align: top\" colspan=\"4\">\n<hr \/>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;vertical-align: top\">11\u2019-0\u201d to 14\u2019-0\u201d optimum<\/td>\n<td style=\"text-align: left;vertical-align: top\">5\u2019-0\u201d Min. (two way)<\/td>\n<td style=\"text-align: left;vertical-align: top\">5\u2019-0\u201d passing<\/td>\n<td style=\"text-align: left;vertical-align: top\">Min. 8\u2019 wide where context dictates and supported through low use counts.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;vertical-align: top\" colspan=\"5\">\n<hr \/>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;vertical-align: top\"><strong>Maximum Longitudinal Slope<\/strong><\/td>\n<td style=\"text-align: left;vertical-align: top\">5% (1:20)<\/td>\n<td style=\"text-align: left;vertical-align: top\">5% (1:20)<\/td>\n<td style=\"text-align: left;vertical-align: top\">5% (1:20)<\/td>\n<td style=\"text-align: left;vertical-align: top\">4.8% preferred for construction tolerances 5% (1:20) Max.<br \/>\nDeviations allowed by ADA. Allowed to exceed based on adjoining roadway slope based on approved deviation.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;vertical-align: top\" colspan=\"5\">\n<hr \/>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;vertical-align: top\" rowspan=\"3\"><strong>Maximum Cross Slope<\/strong><\/td>\n<td style=\"text-align: left;vertical-align: top\">1% (1:100) Recommended<\/td>\n<td style=\"text-align: left;vertical-align: top\">1% (1:100) Recommended<\/td>\n<td style=\"text-align: left;vertical-align: top\">2% (1:50) Max.<\/td>\n<td style=\"text-align: left;vertical-align: top\">1.8% preferred for construction tolerances<br \/>\n2% (1:50) Max.<br \/>\n1% (1:100) Min.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;vertical-align: top\" colspan=\"4\">\n<hr \/>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;vertical-align: top\">2% (1:50) Max.<\/td>\n<td style=\"text-align: left;vertical-align: top\">2% (1:50) Max.<\/td>\n<td style=\"text-align: left;vertical-align: top\"><\/td>\n<td style=\"text-align: left;vertical-align: top\">1.8% preferred for construction tolerances<br \/>\n2% (1:50) Max.<br \/>\nDesign and set construction forms to 1.5%<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;vertical-align: top\" colspan=\"5\">\n<hr \/>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;vertical-align: top\" rowspan=\"3\" valign=\"middle\"><strong>Clear Zone<\/strong> (See <a href=\"https:\/\/greatriversgreenway.org\/design-guidelines\/trail-design\/shoulder-standards\/\" target=\"_blank\">Trail Shoulder Standard<\/a>s for more information)<\/td>\n<td style=\"text-align: left;vertical-align: top\">2\u2019-0\u201d Min.<\/td>\n<td style=\"text-align: left;vertical-align: top\"><\/td>\n<td style=\"text-align: left;vertical-align: top\">2.5\u2019x4\u2019 Min.<\/td>\n<td style=\"text-align: left;vertical-align: top\">3\u2019-0\u201d Optimum width (includes 1\u2019-0\u201d header)<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;vertical-align: top\" colspan=\"4\">\n<hr \/>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;vertical-align: top\">3\u2019-0\u201d Optimum<\/td>\n<td style=\"text-align: left;vertical-align: top\"><\/td>\n<td style=\"text-align: left;vertical-align: top\"><\/td>\n<td style=\"text-align: left;vertical-align: top\">1\u2019-6\u201d Min.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;vertical-align: top\" colspan=\"5\">\n<hr \/>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;vertical-align: top\" rowspan=\"3\"><strong>Minimum Vertical Clearance<\/strong><\/td>\n<td style=\"text-align: left;vertical-align: top\">\u00a08\u2019-0\u201d Min.<\/td>\n<td style=\"text-align: left;vertical-align: top\"><\/td>\n<td style=\"text-align: left;vertical-align: top\">\u00a08\u2019-0\u201d Min.<\/td>\n<td style=\"text-align: left;vertical-align: top\">\u00a08\u2019-0\u201d Min.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;vertical-align: top\" colspan=\"4\">\n<hr \/>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;vertical-align: top\">\u00a010\u2019-0\u201d Optimum<\/td>\n<td style=\"text-align: left;vertical-align: top\"><\/td>\n<td style=\"text-align: left;vertical-align: top\"><\/td>\n<td style=\"text-align: left;vertical-align: top\">\u00a010\u2019-0\u201d Optimum<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;vertical-align: top\" colspan=\"5\">\n<hr \/>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;vertical-align: top\"><strong>Design Speed<\/strong><\/td>\n<td style=\"text-align: left;vertical-align: top\">20 mph<\/td>\n<td style=\"text-align: left;vertical-align: top\"><\/td>\n<td style=\"text-align: left;vertical-align: top\"><\/td>\n<td style=\"text-align: left;vertical-align: top\">12 mph preferred. Design speeds have been determined to best suit users of all types and abilities.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;vertical-align: top\" colspan=\"5\">\n<hr \/>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;vertical-align: top\"><strong>Minimum Centerline Curve Radii <\/strong><\/td>\n<td style=\"text-align: left;vertical-align: top\">90\u2019-0\u201d (20 mph design speed)<\/td>\n<td style=\"text-align: left;vertical-align: top\"><\/td>\n<td style=\"text-align: left;vertical-align: top\"><\/td>\n<td style=\"text-align: left;vertical-align: top\">42\u2019-0\u201d for single-unit trucks (12 mph design speed)<br \/>\nUnless maintenance needs absolutely warrant larger radius for access.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;vertical-align: top\" colspan=\"5\">\n<hr \/>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;vertical-align: top\"><strong>Railing Height<\/strong><\/td>\n<td style=\"text-align: left;vertical-align: top\">42\u201d\/48\u201d<\/td>\n<td style=\"text-align: left;vertical-align: top\">30\u201d or greater<\/td>\n<td style=\"text-align: left;vertical-align: top\">42\u201d<\/td>\n<td style=\"text-align: left;vertical-align: top\">42\u201d Min. unless greater is required by local laws or owner\/operator rights.<br \/>\n48\u201d where conditions warrant additional protection.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;vertical-align: top\" colspan=\"5\">\n<hr \/>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;vertical-align: top\"><strong>Separation from Curb or Edge of Pavement<\/strong><\/td>\n<td style=\"text-align: left;vertical-align: top\">5\u2019-0\u201d<\/td>\n<td style=\"text-align: left;vertical-align: top\"><\/td>\n<td style=\"text-align: left;vertical-align: top\"><\/td>\n<td style=\"text-align: left;vertical-align: top\">See <a href=\"https:\/\/greatriversgreenway.org\/design-guidelines\/trail-design\/shoulder-standards\/\" target=\"_blank\">TRAIL SHOULDER STANDARDS<\/a><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;vertical-align: top\" colspan=\"5\">\n<hr \/>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;vertical-align: top\"><strong>Vehicle Loading<\/strong><br \/>\n(for maintenance or emergency access)<\/td>\n<td style=\"text-align: left;vertical-align: top\"><\/td>\n<td style=\"text-align: left;vertical-align: top\"><\/td>\n<td style=\"text-align: left;vertical-align: top\"><\/td>\n<td style=\"text-align: left;vertical-align: top\">H5 (10,000lbs) min.<br \/>\nH10 (20,000lbs) where trail serves as the only access route<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>While the design guidelines are an outline for the development for GRG greenway facilities, design and implementation are governed by&#8230;<\/p>\n","protected":false},"author":3,"featured_media":0,"parent":78,"menu_order":17,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-133","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/greatriversgreenway.org\/design\/wp-json\/wp\/v2\/pages\/133","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/greatriversgreenway.org\/design\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/greatriversgreenway.org\/design\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/greatriversgreenway.org\/design\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/greatriversgreenway.org\/design\/wp-json\/wp\/v2\/comments?post=133"}],"version-history":[{"count":0,"href":"https:\/\/greatriversgreenway.org\/design\/wp-json\/wp\/v2\/pages\/133\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/greatriversgreenway.org\/design\/wp-json\/wp\/v2\/pages\/78"}],"wp:attachment":[{"href":"https:\/\/greatriversgreenway.org\/design\/wp-json\/wp\/v2\/media?parent=133"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}