Interstate 80 in California
Interstate 80 (I-80) is a transcontinental Interstate Highway in the United States, stretching from San Francisco, California, to Teaneck, New Jersey. The segment of I-80 in California runs east from San Francisco across the San Francisco–Oakland Bay Bridge to Oakland, where it turns north and crosses the Carquinez Bridge before turning back northeast through the Sacramento Valley. I-80 then traverses the Sierra Nevada, cresting at Donner Summit, before crossing into the state of Nevada within the Truckee River Canyon. The speed limit is at most 65 mph (105 km/h) along the entire route instead of the state's maximum of 70 mph (110 km/h) as most of the route is in either urban areas or mountainous terrain. I-80 has portions designated as the Eastshore Freeway and Alan S. Hart Freeway.
The western terminus of I-80 in San Francisco, viewed from northbound US 101
Eastshore Freeway in Berkeley, view south toward Pacific Park Plaza in Emeryville
Bats flying from under the Yolo Causeway in Yolo County
Looking northeast along I-80 in the Sierra Nevada from the Yuba Gap overpass
San Francisco–Oakland Bay Bridge
The San Francisco–Oakland Bay Bridge, known locally as the Bay Bridge, is a complex of bridges spanning San Francisco Bay in California. As part of Interstate 80 and the direct road between San Francisco and Oakland, it carries about 260,000 vehicles a day on its two decks. It includes one of the longest bridge spans in the United States.
The western section of the bridge, seen in 2022. Part of the eastern section can be seen near Yerba Buena Island to the left.
Sketch of the proposed "Rush San Francisco Trans-Bay Suspension Bridge" (1913)
Preliminary layout studies for the bridge, with Figures "H", and "P" selected as the final construction choice for western and eastern sections
The Bay Bridge under construction at Yerba Buena Island in 1935
