Caltrans PeMS offers real-time and archived traffic data from California's freeway sensors for monitoring and analysis.
Access real-time California traffic data
Caltrans PeMS is a platform that provides real-time traffic data collected from thousands of sensors across California freeways. It helps you view and analyze traffic conditions in major metropolitan areas like San Francisco and Los Angeles. The data is updated continuously, making it useful for understanding current traffic flow and congestion.
You can explore traffic patterns through an interactive map and access archived data for deeper performance measurement and transportation studies. The site is designed for commuters, planners, and researchers who need accurate and timely traffic information to make informed decisions or study transportation trends.
By using PeMS, you gain insight into California's freeway system traffic behavior, supported by a broad network of detectors. This makes it easier to plan trips, analyze traffic performance, or support intelligent transportation system initiatives.
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