Severely sloped shoulders may cause pedestrians to move closer to traffic to avoid walking on the slope. Narrow lanes and shoulders create increased hazards as pedestrians walk close to high-speed traffic, and raised curbs present a barrier to some pedestrians. Pietrucha and Opiela suggested such guidelines in the Green Book would be helpful to highway designers. Wheelchair Ramps at Intersections . Driveways and Access Management .
Driveways create an intersection where they cross sidewalks.
There are generally no warnings to alert pedestrians to the hazards of such intersections. They suggested updating the Green Book to weave pedestrian concerns into the text and to develop an integrated approach to highway design. Devising a roadway-function classification scheme that includes pedestrians, Studying the costs and benefits of installing roadway improvements for pedestrians, Designing pedestrian improvements that are inexpensive to maintain, and Investigating ways to retrofit existing roadways that are poorly suited for pedestrian use.