ACE will run Valley Link rail system Valley Link, the proposed commuter rail project that would connect the Northern San Joaquin Valley with the 131-mile BART system with 50 stations throughout the Bay Area, will be operated by the same agency that runs the Altamont Corridor Express. The Tri-Valley-San Joaquin Valley Regional Rail Authority has entered into an agreement for the San Joaquin Regional Rail Commission to operate Valley Link that is working toward a 2028 start-up date. The SJRRC also manages the Amtrak San Joaquin. The Valley Link system ultimately means commuters in Ceres, Modesto, Ripon, and Manteca could get go all the way to downtown San Francisco via ACE with transfers to Valley Link and BART. Lathrop commuters could take Valley Link and switch to BART.