> The SFBay I-880 and US-101 are always packed

A lot of this is due to the freeway system being unfinished.

101 would have been supplemented by the Bayfront Freeway (CA 87): https://cahighways.org/ROUTE087.html#_ROUTING_SEG2

And 880 by routes 61, 238, 185, 13, and 77:

- https://cahighways.org/ROUTE061.html#_HIST1964

- https://cahighways.org/ROUTE238.html

- https://cahighways.org/ROUTE185.html

- https://cahighways.org/ROUTE013.html

- https://cahighways.org/ROUTE077.html