[[File:Caltrain train 1.jpg|thumb|250px|Northbound Baby Bullet in 2005]]
The '''Caltrain Express''' ('''CTX''') (also known as the Baby Bullet) project was implemented from 2002 to 2004 and led to the establishment of the '''Baby Bullet''' express service, which shortened the transit time between [[San Francisco]] and [[San Jose, California|San Jose]], and certain stations in between. New locomotives and rolling stock were purchased for dedicated express service, bypassing most stations; [[Quadruple-track railway|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 [[Track (rail transport)#Continuous welded rail|continuous-welded rail]]; a [[centralized traffic control]] system was added; and [[railroad switch|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 is up to 20% faster than driving south from San Francisco to San Jose.
