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2008 Congestion Data

Caltrans and MTC Data on 2008 Traffic Congestion in the Bay Area

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New carpool lanes along U.S. 101 in Marin County have helped to ease traffic congestion in this corridor in recent months. Seen here is a view of the carpool lane on southbound U.S. 101, near the Interstate 580 interchange (Photo: Bill Hall, Caltrans)

Ramp meters are credited with helping to reduce congestion along Interstate 580 in the Tri-Valley area of the East Bay. Shown here is a metered on-ramp to eastbound I-580 in Dublin (Photo: John Huseby, Caltrans)

An electronic sign notifies motorists that metering lights are in use at this entrance to Interstate 580 in the Tri-Valley (Photo: John Huseby, Caltrans)

Metering lights at freeway on-ramps help regulate the flow of traffic on Interstate 580 through the Tri-Valley (Photo: John Huseby, Caltrans)

Electronic signs notify motorists when metering lights are in use at on-ramps to Interstate 580. (Photo: John Huseby, Caltrans)

Metering lights at freeway on-ramps help regulate the flow of traffic on Interstate 580 through the Tri-Valley (Photo:John Huseby, Caltrans)