SF Bay Bridge...

http://www.foundsf.org/index.php?title=File:Bw_6_lanes_on_bay_bridge_1946_AAD-2274.jpg

http://baybridgeinfo.org/sites/default/files/images/timeline/opening_day_of_bridge.jpg

http://aerialarchives.photoshelter.com/image/I0000lSW0vJBgdlM

http://aerialarchives.photoshelter.com/search?I_DSC=Bay%20Bridge&_ACT=search&I_DSC_AND=t

https://www.facebook.com/AerialArchives/posts/655895474423600

http://aerialarchives.photoshelter.com/gallery/San-Francisco-Oakland-Bay-Bridge-Aerial-Photography/G0000nuFOSD2Buns

http://aerialarchives.photoshelter.com/gallery-image/San-Francisco-Oakland-Bay-Bridge-Aerial-Photography/G0000nuFOSD2Buns/I0000QzxTaFxTBDM

http://aerialarchives.photoshelter.com/image?&_bqG=33&_bqH=eJyL8rJIjQrxMc8rCcryKjd3yotMdTEPyc4wyCi2MjQ1t7QyMrUyNAACK894l2Bn2.DEPG23osS85Mzi5Hw1sFi8o5.LbQmQHRrsGhTv6WIbClIf7J6TYWaUVeZmkq4W7.gcYlucmliUnAEAioAiWw--&GI_ID=