This contains the entire dataset used in the NCST report: Evaluating Alternative Strategies for Traffic Reduction in Los Angeles. The primary data comes from California Department of Transportation’s (Caltrans) Performance Measurement System (PeMS). PeMS contains data on traffic speeds and flows from thousands of inductive loop detectors built into limited-access highways (freeways) across California. This data is collected in real-time at 30-second intervals, and then Caltrans conducts extensive tests of data quality and provides the data in raw and aggregated form. This data is supplemented with data on vehicle crashes. The researchers used the data for 2017 covering Caltrans District 7, which consists of Los Angeles County and Ventura County.
