The proposed Downtown Rail Extension, if accomplished, would connect Caltrain and the California High-Speed Rail undertaking to BART in San Francisco correct via an underground pedestrian walkway between Caltrain platforms at the Salesforce Transit Center and BART's Embarcadero station. If the aforementioned Downtown Rail Extension is accomplished, the underground walkway between the Salesforce Transit Center and Embarcadero station would also join Caltrain to Muni Metro's F Market & Wharves, J Church, K Ingleside, and M Ocean View, as well as providing a second connection to the N Judah and linking Caltrain with the California avenue cable automotive line. In August 2005, as a part of its Vasona gentle rail project, VTA light rail established its third switch level with Caltrain at San Jose's central practice station Diridon. Along with many bus connections, VTA mild rail service has two other Caltrain switch points at San Jose's Tamien and at Mountain View. As a consequence of demand, in 2011, the remaining gallery sets modified a passenger trailer to take bicycles, giving two bike automobiles to all consists, rising capacity on all gallery consists to 80 bicycles per practice. Although the Baby Bullet runs initially used 5-automotive Bombardier consists, most of the Baby Bullet runs returned to 5-automotive gallery sets because of their superior bicycle capability, since demand for bicycle car entry was excessive.

With the acquisition of Bombardier automobiles from Metrolink, Caltrain announced in January 2015 that roughly half of the additional ex-Metrolink vehicles will likely be converted to bike cars with capability for 24 bikes, so some trains operating Bombardier automobiles shall be six-automobile consists, of which three might be bike vehicles. Caltrain passengers can hook up with San Jose International Airport via VTA bus No. 60 at the Santa Clara Transit Center. Shuttle connections through the Stanford Marguerite Shuttle are available to Stanford University at the Palo Alto and California Avenue stations and San Jose State University at the San Jose station. The long run San Jose BART extension would also introduce connecting BART service at Diridon station and Santa Clara station. Since Caltrain doesn't run in the East Bay, connections to Oakland International Airport must utilize BART's Oakland Airport connector at Coliseum station, itself reachable by boarding a red line train at Millbrae and subsequently transferring to a blue or green line practice between Daly City and West Oakland, or by transferring to VTA gentle rail's orange line at Mountain View and transferring to green or מלון עם קזינו בבטומי orange line BART services at Milpitas.

Caltrain passengers might transfer to BART or SamTrans on the Millbrae Intermodal Station for journey to San Francisco International Airport (SFO). Prior to the opening of the airport extension in 2003 a free shuttle bus operated between Millbrae and the airport. Previous to 2016, both Bombardier and gallery trains used 5-automobile consists. Official bike capability for six-automotive Bombardier consists is seventy two (24 bikes × three automobiles), comparable to the 80-bike capacity of five-automobile gallery consists (40 bikes × 2 automobiles). The Baby Bullets, favored by many cyclists, usually use lower bike-capacity Bombardier vehicles and cyclists may have to watch for slower trains with increased-capacity gallery automobiles, or seek alternate transportation. Gallery vehicles modified for bicycle service removed seats from the decrease degree in the north half of the automobile, leading to space to carry 32 bicycles per car. To provide an alternative to bringing bicycles on board the trains, Caltrain has put in bicycle lockers at most stations, and constructed a brand new bicycle station on the San Francisco station. Caltrain was certainly one of the first commuter rail services so as to add bicycle capacity to its trains, inaugurating bicycle service in 1992 by permitting 4 bikes on sure trains. Cyclists are required to tie their bicycle to the rack with the bungee cord provided, and have to be racked so they don't protrude into the aisle.

Each rack can accommodate 4 bicycles. Bicycles have to be single-rider, with a maximum of eighty inches (2,000 mm) in size, and tandem or three-wheel bikes should not allowed. Because the bikes are stacked collectively in opposition to the racks, most riders place a vacation spot tag, accessible from a conductor, on their bicycles to optimize placement and decrease shuffling. Nearly all stations have racks and/or lockers accessible to park bicycles. The preliminary pilot program launched in 1992 allowed up to four bikes per practice for off-peak service, with bicycles had been carried within the cab car (northernmost automobile). However, in early 2009 Caltrain introduced that it would be expanding bicycle capability by 8 spots by removing some seats within the bike vehicles, bringing bike capacity to 40 bikes on gallery automobiles and 24 bikes on Bombardier vehicles. The variation on bicycle capacity between trainsets has generated criticisms from the bicycling neighborhood, as cyclists may be denied boarding when a train reaches its bicycle capacity. Vol. 57, no. 740. May 20, 1882. p.