36 CFR Part 1190, Proposed Accessibility Guidelines for Pedestrian Facilities in the Public Right-of-Way; Shared Use Paths: Supplemental Notice of Proposed Rulemaking (SNPRM)

R304 Curb Ramps and Blended Transitions

The SNPRM would revise R304.5.1 to read as follows:

R304.5.1 Width. The width of curb ramps and blended transitions shall comply with 304.5.1.1 or 304.5.1.2, as applicable. If provided, flared sides of curb ramp runs and blended transitions shall be located outside the width of the curb ramp run or blended transition.

R304.5.1.1 Pedestrian Circulation Paths Other Than Shared Use Paths. In pedestrian circulation paths other than shared use paths, the clear width of curb ramp runs, blended transitions, and turning spaces shall be 1.2 m (4.0 ft) minimum.

R304.5.1.2 Shared Use Paths. In shared use paths, the width of curb ramps runs and blended transitions shall be equal to the width of the shared use path.

As proposed in the NPRM, R304.5.1 would require the clear width of curb ramp runs (excluding flared sides), blended transitions, and turning spaces to be 4 feet minimum.

The SNPRM would renumber R304.5.1 to include a general provision in R304.5.1 that would clarify that if flared sides are provided at curb ramps and blended transitions, the flared sides are to be located outside the width of the curb ramp run or blended transition; and a specific provision for pedestrian circulation paths other than shared use paths in R304.5.1.1 that would require the clear width of curb ramp runs, blended transitions, and turning spaces to be 4 feet minimum, as proposed in the NPRM.

The SNPRM would add a new provision for shared use paths at R304.5.1.2 that would require the width of curb ramps runs and blended transitions to be equal to the width of the shared use path.

The proposed provision for shared used paths is consistent with the AASHTO Guide. The AASHTO Guide recommends that where curb ramps are provided on shared use paths, the curb ramps should extend the full width of the path, not including any flared sides. See AASHTO Guide, 5.3.5 Other Intersection Treatments.