Neat Online freeway status of California at a glance
PeMS 4.4: Public > D4 - Bay Area is the "near-real-time" capture of the speeds of the various freeways in the Bay Area. It uses the various feedback loops set into the road and transmits it back to the central server. The main page actually has a mapping of the entire state of California - subdivided into 12 sections.   And if you didn't know, Los Angeles has terrible traffic. 

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