| Caltrain Express (CTX) | |
|---|---|
 Northbound Baby Bullet in 2005 | |
| Location | San Francisco Peninsula |
| Owner | Caltrain |
| Established | April 4, 2002 (contract award) |
| Launched | 2004 (revenue service) |
| Status | In service |
| Website | caltrain (Archived Apr 12, 2003) |
The Caltrain Express Program (CTX) was implemented from 2002 to 2004 to establish the Baby Bullet express service, which shortened the transit time on the Caltrain commuter rail line between San Francisco and San Jose, and certain stations in between. New locomotives and rolling stock were purchased for dedicated express service, bypassing most stations; quad-track overtake sections were added in two locations along the Peninsula Corridor right-of-way to allow express trains to pass slower local trains that were making all stops; tracks were also upgraded with continuous-welded rail; a centralized traffic control system was added; and crossovers were added every few miles to allow single-tracking trains around disabled trains. Congresswoman Jackie Speier, then serving as a California State Senator, is credited with securing the funding for CTX and one of the new locomotives acquired for the project is named for her as a result. During commute hours, the Baby Bullet went up to 20 percent faster than driving south from San Francisco to San Jose. On September 21, 2024, with the completion of the Caltrain modernization project and the transition to electrified trains, the Baby Bullet was renamed as simply the Express service.[1]