bicyclist collisions in Sacramento

This post complements my recent post on pedestrian collisions in Sacramento. Please see that post for details about data sources (SWITRS GIS Map in TIMS) and mapping.

The collisions mapped are:

• Date: 01-01-2004 to 12-31-2012
• Location: City of Sacramento only (no, I can’t explain why some are outside the city)
• Victim role: Bicyclist
• Victim degree of injury: Killed or Severe Injury
• 143 collisions (the pedestrian collisions were 388)

The overall number of bicyclist collisions in the killed or severe injury category over this nine year period is low enough that patterns may not accurately represent hazardous roadways since a small number of collisions can significantly change the pattern.

The first map, a point map of the entire city, shows:

• the greatest density of collisions is in downtown/midtown, but there are certainly plenty in other areas
• almost all collisions happen at intersections, not mid-block
• almost all collisions are associated with major streets, called arterials and collectors, which are wide and high speed, intended to move motor vehicle traffic at speed rather than provide for multi-modal transportation