Raised Pedestrian Crosswalks
At a speed table, a marked crosswalk provides a level area for pedestrians crossing the street. Traffic is slowed as motorists must go up and over the crosswalk.
Raised pedestrian crosswalks serve as traffic calming measures by extending the sidewalk across the road and bringing motor vehicles to the pedestrian level. Raised crosswalks also improve accessibility by allowing a pedestrian to cross at nearly a constant grade without the need for a curb ramp and makes the pedestrian more visible to approaching motorists. They have a trapezoid-shaped cross-section to slow motorists at the pedestrian crossing where the slowing will be most effective. Speed tables outfitted with crosswalk markings are used on local streets, but they may not be applicable for some collector streets due to an increase in emergency vehicle response time.
The raised crosswalk in this parking lot slows traffic at the sidewalk crossing and draws more attention to the pedestrian crossing.
Roadways are not the only places traffic calming devices can be useful. Raised crosswalks can be used in school parking lots to slow traffic and more safely allow pedestrians to cross the parking lots. When used, care must be taken to accommodate drainage in the parking lot and to prevent water from pooling.
Treatment: Raised Pedestrian Crosswalks (Speed Tables)
A speed table the width of a typical crosswalk stretching across an entire intersection, slowing traffic and keeping the crossing at grade with the sidewalk.
- Decrease in motor vehicle speeds generally occur.
- An increase of vehicular yield rate by as much as 45 percent due to adding speed tables.
Costs range from $1,500 to $30,000 with an average cost of approximately $8,200 (Bushell, Poole, Zegeer, Rodriguez, 2013).
Keys to Success
- Should not be used on sharp curves or steep grades.
- Visually impaired pedestrians need warning strips at edges to indicate the beginning of the crosswalk.
- Colors and special paving materials can be used for an urban design effect.
Key Factors to Consider
- May not be appropriate if the intersection is part of a bus or emergency route.
- Potential drainage issues.
- Number of crashes.
- Severity of crashes.
- Motor vehicle speeds.
- Traffic volume