If you want to spend the time to dig into it, Caltrans has a more detailed dataset of historical traffic [1]. I used to research traffic in the Bay Area, and it

If you want to spend the time to dig into it, Caltrans has a more detailed dataset of historical traffic [1]. I used to research traffic in the Bay Area, and it was fascinating to see the way in which it responded to different events. [1] http://pems.dot.ca.gov/ http://pems.dot.ca.gov/