Interstate 80 crosses San Francisco at an edifice that carries how many vehicles?
Interstate 80 in California Interstate 80 (I-80) is a major east–west route of the Interstate Highway System, running between the U.S. states of California and New York. The highway has its western terminus in San Francisco. From there it heads east across the 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 along the entire route instead of the state's maximum of 70 mph and 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.
19th Avenue (San Francisco) 19th Avenue in San Francisco, California, is an 8 km (5 miles) long, six-lane arterial thoroughfare that bisects the southwestern part of the city.