The Peninsula Commuter started in 1863 and made it as a private enterprise until Southern Pacific petitioned for dissolution in 1977.
Dad rode it from Burlingame to San Francisco and occasionally to San Jose for work. Mom & I used to take him in the ’62 Chevy Biscayne or he would take the Jeep. I recall him saying that if he was running late, he would get on at the California Drive Station and shut the Jeep off and hop out letting it “self-park” by rolling to a stop in gear and stalling against the parking stops made from telephone poles. Was ahead of Tesla on that score.
In the 1930’s and 1940’s, he and grandma would ride from San Mateo (well, Broadway, Burlingame Station) to San Francisco to go to Emporium for a day of shopping.
Kudos to Wiki for the link and the maps below here.
Now its CALTRAIN that is continuing the tradition of mass transit.