The California Highway Patrol: An Evaluation of Public Contacts in Stop Data

By Emily Owens and Jaclyn Rosenquist

In order to better understand the role that race or ethnicity may play in who is stopped by their officers, the California Highway Patrol (CHP) provided the California Policy Lab (CPL) with a data set of 2,141,817 enforcement stops made by the CHP from January to December of 2019. The data was collected pursuant to California’s Racial and Identity Profiling Act of 2015 (RIPA). In order to extend the statistical analysis presented in the 2021 Annual RIPA Board Report, we evaluated enforcement stops in combination with non-enforcement stops using two generally accepted approaches to measure racially disparate policing: benchmarking and a hit rate analysis.

Los Angeles: California Policy Lab, 2021. 59p.