Altamont Corridor Express
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The Altamont Corridor Express is a commuter rail service in California, connecting Stockton and San Jose during peak hours only. ACE is named for the Altamont Pass, through which it runs. Service is managed by the San Joaquin Regional Rail Commission, and operations are contracted to Herzog Transit Services. The 86-mile (138 km) route includes ten stops, with travel time about 2 hours and 12 minutes end-to-end. In 2023, the line had a ridership of 576,300, or about 2,500 per weekday as of the fourth quarter of 2023. ACE uses Bombardier BiLevel Coaches, MPI F40PH-3C locomotives, and Siemens Charger locomotives.
Altamont Corridor Express train climbing its namesake Altamont Pass
ACE train at San Jose Diridon station
ACE service to Santa Clara station began in 2001, was suspended in 2005, and returned in 2012.
Car in new Altamont Corridor Express livery at Fremont station in July 2018
Siemens Charger
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The Siemens Charger is a family of diesel-electric/dual-mode passenger locomotives designed and manufactured by Siemens Mobility for the North American market.
#2110, a Caltrans owned SC-44, operating on the Pacific Surfliner
Caltrans Charger pushing a San Joaquin train at Oakland – Jack London Square station in November 2017
Siemens ALC-42 at Portland Union Station
WSDOT SC-44#1401 in Seattle