Dome

Bayshore Freeway (US Highway 101) looking north with San Bruno Mountains in the distance (San Francisco is on the other side); Transportation in the San Francisco Bay Area is reliant on a complex multimodal infrastructure consisting of roads, bridges, highways, rail, tunnels, airports, and bike and pedestrian paths. Various agencies collectively manage several interstate highways and state routes, two subway networks, two commuter rail agencies, eight trans-bay bridges, a ferry, local bus service, three international airports, and an extensive network of roads, tunnels, and bike paths. Eight-lane and, in some parts, 10-lane freeways connect San Francisco to San Jose through the Peninsula. Source: Wikipedia; http://en.wikipedia.org/wiki/Main_Page (accessed 9/2/2015)