What is San Francisco–Oakland Bay Bridge?
{{Infobox bridge |bridge_name = San Francisco–Oakland Bay Bridge |image = Oakland Bay Bridge Western Part.jpg |image_size = |caption = The western section of the San Francisco–Oakland Bay Bridge | |carries = 10 lanes of {{Jct|state=CA|I|80}} throughout, and pedestrians and bicycles east of [[Yerba Buena Island]] (YBI) |crosses = [[San Francisco Bay]]<br />via YBI |locale = [[San Francisco]] and [[Oakland, California]], United States |owner = [[State of California]] |maint = [[California Department of Transportation]] and the [[Bay Area Toll Authority]] |id = * 34 0003 (West) * 34 0004 (YBI Tunnel) * 33 0025 (East)<ref name=NRHP525 /> |designer = [[Charles H. Purcell]] |design = Double-decked [[suspension bridge|suspension]] spans (two, connected by center anchorage), [[tunnel]], cast-in-place concrete transition span, [[Self-anchored suspension bridge|self-anchored suspension span]], [[precast concrete|precast]] [[Segmental bridge|segmental concrete viaduct]] |material = Steel, concrete |pierswater = |mainspan = West: two main spans <br /> {{convert|2310|ft|0|abbr=on}} <br />East: one main span <br />{{convert|1400|ft|abbr=on}} |length = West: {{convert|10304|ft|abbr=on}} <br />East span: {{convert|10176|ft|abbr=on}} <br />Total: {{convert|4.46|mi|km}} <br /> excluding approaches |width = West: 5 traffic lanes totaling {{convert|57.5|ft|abbr=on}} <br /> East: 10 traffic lanes totaling {{convert|258.33|ft|abbr=on}} |height = West: {{convert|526|ft|abbr=on}}<ref>[http://www.dot.ca.gov/hq/esc/tollbridge/SFOBB/Sfobbfacts.html San Francisco-Oakland Bay Bridge] {{webarchive |url=https://web.archive.org/web/20101103075716/http://www.dot.ca.gov/hq/esc/tollbridge/SFOBB/Sfobbfacts.html |date=November 3, 2010 }}</ref> |load = |clearance = Westbound: {{convert|14|ft|m}}, with additional clearance in some lanes <br />Eastbound: {{convert|14.67|ft|m}} |below = West: {{convert|220|ft|m}} <br />