Understanding Compliance

www.fhwa.dot.gov/environment/bikeped/prwaa.htm
www.access-board.gov/PROWAC/draft.htm

R304.1.4 Curb Ramp and Size of Detectable Warning Area

  • Full width of ramp excluding flares
  • 24″ minimum in the direction of travel

R304.2.1 Perpendicular Curb Ramps

  • Grade break less than 5 feet from back of curb
  • Grade break greater than 5 feet from back of curb

R304.2.2 Landings and Blended Transitions

  • Located on landing or blended transition at back of curb
  • 24″ in the direction of travel

R304.2.3 Rail Crossing

  • Edge nearest rail crossing is 6 feet minimum and 15 feet maximum from center line of the nearest rail
  • Truncated domes shall be aligned to be parallel with the
    direction of wheelchair travel

R305.4 Medians and Pedestrian Refuge Islands

  • Shall have detectable warnings that comply with R304 at ramps and blended transitions
  • At cut through islands at curb line in-line with face of curb and shall be separated by a 2 foot minimum length of walkway without detectable warnings