STANDARD CROSS SECTION – TRAIL AT BRIDGE UNDERPASS

MENUMENU

There are many instances where trails will pass beneath vehicular bridges to create a grade separated path. Vertical clearance is critical, and for longer underpasses lighting may be needed.

  • Maintain 8’-0” minimum vertical clearance or higher as required by municipal/partner needs.
  • 2% max trail cross slope.
  • The typical 3’-0” minimum level shoulder should be maintained on either side of trail.
  • Incorporate guardrail or other safety barrier between trail and lower slope, where lower slope is in excess of 3:1, stabilized with hard material or along a wall with a fall of greater than 2’-6”.
  • Drainage from overpass above should be routed away from trail. Water should never fall directly on trail.
  • Should be designed to withstand potential flooding. Fencing should be cable rail system where likely to flood.
  • Design should consider flood debris removal and sediment removal, allowing maintenance equipment access as required by maintenance partner. Design should also consider maintenance requirements for overpass.

STANDARD CROSS SECTION

COMPONENTS: Click below for more information on each component.

1) Primary Trail Surfacing

2) Trail Shoulder

3) Permanent Bank Stabilization

4) Handrail