Practices for Adding Bicycle and Pedestrians Access on Existing Vehicle Bridges

State departments of transportation (DOTs) have created plans for improving or expanding existing bicycle/pedestrian networks to increase active transportation options along their state owned roadways. Expanding these networks on roadways might be accomplished by reallocating roadway space and dedicating bicycle lanes or by constructing new sidewalks or cycle tracks to safely accommodate pedestrians and bicycle riders. However, since many vehicle bridges were not originally designed for pedestrians or bicycles (e.g., no sidewalks or shoulders), they represent one source of gaps in existing and potential bicycle and pedestrian networks. Closing these gaps across an existing vehicle bridge is a common problem for state DOTs with no "one size fits all" solution. The objective of this synthesis is to document the practices employed by state DOTs to provide or improve access to existing bridges for active transportation users. The synthesis will only focus on existing bridges and not on new construction. Information to be gathered includes (but is not limited to): (1) Techniques that state DOTs have used, are using, or have considered using to improve access to existing bridges (e.g., dedicated bicycle lanes, shared bicycle/vehicle lanes, sidewalk extensions, new sidewalks, cantilevered sidewalks, dedicated bridges, or other treatments); (2) Characteristics of the bridges where access has been added (e.g., superstructure, original lane layout, average daily traffic, or another unique charateristic that enabled success); and (3) Case examples for a select number of completed projects or projects in construction.


  • English


  • Status: Active
  • Funding: $45000
  • Contract Numbers:

    Project 20-05, Topic 53-12

  • Sponsor Organizations:

    National Cooperative Highway Research Program (NCHRP) Synthesis

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC    20001

    American Association of State Highway and Transportation Officials (AASHTO)

    444 North Capitol Street, NW
    Washington, DC  United States  20001

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Project Managers:

    Wadsworth, Trey

  • Start Date: 20210524
  • Expected Completion Date: 0
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01771601
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 20-05, Topic 53-12
  • Files: TRB, RIP
  • Created Date: May 17 2021 3:14PM