https://en.wikipedia.org/wiki/Richmond-San_Rafael_Bridge
The R-SR Bridge should have been built with two 4 lane decks, 3 lanes and1 emergency lane on each level.
https://en.wikipedia.org/wiki/Richmond-San_Rafael_Bridge#Third_lanes
Plus, enough space for at least 1 wide bike lane & 1 foot path. Unfortunatly, in the 1950s, having a provision for such things wasn't seen as that important.
https://abc7news.com/post/officials-seek-ideas-for-replacing-richmond-san-rafael-bridge/5733399/
