Some early Amtrak history:
In 1974 passenger service returned to the San Joaquin Valley.
https://history.amtrak.com/blogs/blog/reconnecting-the-san-joaquin-valley
Amtrak History Blog:
Reconnecting the San Joaquin Valley
Posted: February 23, 2018
Quote:
Almost as soon as the last Santa Fe and SP passenger trains moved through the San Joaquin Valley in the lead up to the start of Amtrak service on May 1, residents and civic leaders began advocating for inclusion in Amtrak’s national network. Their multi-year efforts at the state and federal level paid off when the U.S. Department of Transportation appropriated funds in the 1973-74 budget for a daily (San Francisco)-Oakland-Bakersfield-(Los Angeles) roundtrip.
...
San Joaquin began revenue service on March 6, 1974
It is now one of the busier Amtrak routes. Success story?
Quote:
Since the creation of the Amtrak-California partnership, the number of daily San Joaquins roundtrips has grown to seven, and stations served increased from eight to 18. In fiscal year 2017, the San Joaquins constituted the sixth-busiest Amtrak corridor in the country, accommodating more than 1.1 million customer trips.