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Alameda County, CA,

Prioritization Criteria

The eligibility of residential roadways for the traffic calming pilot program will be determined by the following criteria:

  • Roadway should have a functional classification of a local or minor collector roadway. Classifications have been established with Caltrans and FHWA.
  • ADT (Average Daily Traffic) maximum volumes on local roadways: < 1,500 vehicles per day (vpd). maximum volumes on collector roadways: < 3,000 vpd.
  • The posted speed limit must be not more than 30mph.
  • The Critical (85' percentile) Speed must be a minimum of 10 miles per hour mph above the posted speed limit (typically 25 mph) for speed humps.
  • Collision rates on the roadway should exceed Caltrans (District 4, Statewide, and countywide) figures.
  • Lack of adequate vehicle gaps for pedestrian crossing.
  • Roadways must have adequate width or shoulder area.
  • An assessment of existing roadway facilities will be conducted, and additional consideration will be given to those roadways which have Portland Cement Concrete (PCC) curb, gutter and sidewalk. Existing roadway facilities that are on designated suggested routes to school, or are near parks, community centers, senior housing, retail establishments or other pedestrian generators will also be given special consideration even if PCC curb, gutter, and/or sidewalk improvements do not exist.
  • Roadways should be of residential character.

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