Study Methodology
This report documents the findings from a descriptive analysis of all collision data on surface streets in the City of Los Angeles between 2009 and 2013, obtained from the publicly available California Highway Patrol Statewide Integrated Traffic Records System. Although 2013 is the most recent year with complete data, we will occasionally reference provisional 2014 and 2015 data when looking at trends in the past few years. As part of our commitment to use more timely and accurate information, the City is working to further streamline data collection and processing so we can better evaluate our actions to make our streets safer.
FREQUENTLY USED TERMS
The focus of Vision Zero and of this report is primarily on the collisions that result in someone being killed or severely injured( KSI). As shorthand, we will refer to these types of collisions in our report as KSI collisions. Recognizing that many of the factors in a vehicle-to-vehicle collision are different from a vehicle-to-pedestrian collision or a vehicleto-bicycle collision, our analysis often differentiates the collision by the modes involved. Therefore, a bicycle KSI collision refers to a collision that involved someone on a bicycle and resulted in either a severe or fatal injury.
The findings of this report, which informed the development of the City of Los Angeles Vision Zero Action Plan, are divided into categories that answer the who, where, how, why, and when for collisions in Los Angeles. For more detailed information on our methodology, see the accompanying Technical Supplement at visionzero. lacity. org / t-supplement. zip.
VISION ZERO SAFETY STUDY 13