page_title: Altamont Corridor Express
hierarchical_section_title: Altamont Corridor Express
caption_attribution_description: English: Altamont Commuter Express crossing the bridge over the Altamont Pass Road while climbing Altamont Pass. The train is hauled by an EMD F40PH and consists of Bombardier Bilevel VI coaches, with the cab car leading. Deutsch: Ein Altamont Commuter Express erklimmt den Altamont Pass, und überquert hier gerade die Brücke über die Altamont Pass Road. Der Zug besteht aus Bombardier Bi-Level VI-Wagen inkl. Steuerwagen (voraus), und wird von einer EMD F40PH geschoben.
context_page_description: 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, using AAR assigned reporting mark ACEX. The 86-mile route includes ten stops, with travel time about 2 hours and 12 minutes end-to-end. The tracks are owned by Union Pacific Railroad, previously built along the Western Pacific Railroad main line. ACE uses Bombardier BiLevel Coaches and MPI F40PH-3C locomotives.
  Service began on October 19, 1998, with two weekday round trips. A third round trip was added in May 2001, followed by a fourth round trip in October 2012. Saturday service commenced in September 2019. As of 2018, average weekday ridership is 5,900. Under the ACEforward program, a number of improvements to the service are being considered. These include a rerouted line through Tracy, an extension to Modesto and Merced, and connections to BART at Union City and Tri-Valley.
context_section_description: The Altamont Corridor Express (also known as  ACE, formerly Altamont Commuter 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, using AAR assigned reporting mark ACEX. The 86-mile (138 km) route includes ten stops, with travel time about 2 hours and 12 minutes end-to-end. The tracks are owned by Union Pacific Railroad, previously built along the Western Pacific Railroad main line. ACE uses Bombardier BiLevel Coaches and MPI F40PH-3C locomotives. 
  Service began on October 19, 1998, with two weekday round trips. A third round trip was added in May 2001, followed by a fourth round trip in October 2012. Saturday service commenced in September 2019. As of 2018, average weekday ridership is 5,900. Under the ACEforward program, a number of improvements to the service are being considered. These include a rerouted line through Tracy, an extension to Modesto and Merced, and connections to BART at Union City and Tri-Valley.
caption: ACE train traversing Altamont Pass Road while climbing Altamont Pass
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