Metrolink, thecommuter rail system servingSouthern California, operates a fleet of passenger train rolling stock consisting of 60locomotives, 137 activeBombardier BiLevel Coaches (called the “Sentinel Fleet” by Metrolink), and 137Rotem Commuter Cars (called the “Guardian Fleet”). Operation of the weekday train schedule requires 36 locomotives to be operational.^[1]

The first order for rolling stock for Metrolink was purchased before the agency was fully operational. In November 1990, theLos Angeles County Transportation Commission approved the $51 million purchase of 40bi-level passenger train cars from theUrban Transportation Development Corporation (later known asBombardier Transportation).^[2][3] The cars would be based on the design developed for theGO Transit commuter rail system inOntario, Canada. The order would later be expanded to include 63 trailer cars and 31 cab cars. Additionally, 23EMD F59PH locomotives would be purchased from General Motors'Electro-Motive Division (EMD). Metrolink claimed that they offered the cleanest burning, low-emission diesel engines in the nation at the time.^[2] The first of the original fleet was delivered in May of 1992.

An order for an additional 20 Rotem cars was placed after Metrolink obtained a loan from the LACMTA, although this still leaves Metrolink 34 cars short of its goal to completely replace the entire Bombardier fleet. From 2008-2011, due to an increase in ridership, Metrolink leased 10 cars from theUtah Transit Authority's commuter trainFrontRunner.^[4] All leased Frontrunner passenger cars were returned once the newer Hyundai Rotem bilevel cars (Guardian Fleet) went into service.

With a sufficient number of Guardian Fleet cars on hand, former CEO John Fenton introduced new on-board services. All weekday trains now include at least one Quiet Car (designated as the second car back from the locomotive). 35 older Sentinel Fleet coaches were converted to Bicycle Cars by having their seats removed from the lower level.^[5][6] If demand for bicycle cars rise, more cars would be retrofitted. Only the Sentinel Cars are retrofitted due to the Guardian Fleet seats serving as an integral part of the cars’ safety features and therefore the seats cannot be removed. In Summer 2017, Metrolink fitted their Bicycle cars with surf board carriers. Each Bicycle car can now carry up to 5 surfboards for transportation to beaches in between San Clemente and Oceanside.

The extra equipment has also allowed Metrolink to add express service, which reduces travel times up to 45 minutes on the Antelope Valley and San Bernardino Lines as pilot programs. If successful, Metrolink will make the expresses permanent and test express service on other routes.

About 10-30 surplus Sentinel cars are stored close to Union Station on tracks laying parallel to the Los Angeles River. Metrolink's long-term plans for these cars is uncertain as Metrolink's original goal was to replace all of the Sentinel Fleet coaches with the Guardian Fleet coaches, but this is not possible until additional Guardian Fleet orders are placed. The decision of which Sentinel Fleet cars to keep or scrap is complicated. The Sentinel Fleet passenger coaches carry little to no debt, but require major rehabilitation as they are close to the end of their service life. In addition to rehabilitation, the Sentinel Coaches would also require safety features that the Hyundai Rotem Coaches have, such as enhanced seating and break-away tables, but reinforcement of the aluminum alloy body structure isn't needed. (Sentinel Fleet cars lack impact-absorbing horizontal steel side beams and crumple zones.)

On September 3, 2015, Metrolink announced the addition of a second locomotive (leased fromBNSF Railway) to each train set to be coupled in front of the Rotem cab car while they undergo a review of their safety features following the2015 Oxnard train derailment. The cab cars remained in service as passenger coaches. The investigation examined theplow-like attachment under the front of the cab cars that failed to prevent the derailment by allowing wreckage to get under the wheels.^[7][8] On November 1, 2016, the leased BNSF locomotives were returned, as repairs and enhancements to the Rotem cab cars' plows were completed.

Metrolink has contracted withTalgo andSystra to rebuild 50 of its 121 Bombardier Bi-level cars. The $64 million dollar contract, will focus on rebuilding the oldest Generation 1 cars which were delivered in 1992 and never received a manufacturer recommended mid-life overhaul (normally to take place after 15 years of service).^[9][10] The rebuild will replace and upgrade mechanical components of the cars, modernize interiors and will repaint the exterior into a new livery. Metrolink has an option to rebuild the 71 other cars, but does not currently have the funding.

All trains must run with a Guardian cab car and a Guardian coach in position closest to the locomotive for proper crash energy management.^[11]

Fleet Numbers	Qty Delivered	Qty in service	Year(s) Built	Make & Model	Image	Notes
Locomotives
852, 856, 861, 868	23	4	1992–1993	EMD F59PH		Reserve fleet. Rebuilt with lower-emission (Tier 2) engine.
888–902	15	11	2008–2009	MPI MP36PH-3C
903–942	40	40	2016–2021	EMD F125
Passenger cars
101–163	63	60	1992–1993	Bombardier BiLevel Generation 1		24 cars converted into bike cars.
164–182	18	0	1997	Bombardier BiLevel Generation 2		166 and 168 in storage. Others sold toCaltrain.[12]
183–210	27	26	2002	Bombardier BiLevel Generation 3		Generation 3 cars with smooth sides (without rivets) and power ports at most seats.
211–290	60	160	2010–2013	Rotem Commuter Cars		211 and 263 involved in2015 Oxnard train derailment and are in storage.
Cab cars
601–631	31	22	1992–1993	Bombardier BiLevel Generation 1		Generation 1 ex-cab cars with only one front window. 15 cars rebuilt and converted into trailer cars with cab compartment removed. 6 cars stored
632–637	6	3	1997	Bombardier BiLevel Generation 2		Generation 2 cab cars with 2 front windows. 2 cars stored
638–665, 667-695	50	53	2010–2013	Rotem Commuter Cars		666 renumbered to 695 in late 2014. 645 involved in2015 Oxnard train derailment and in storage.
References:[11][13][14][15]

• Metrolink (California)
• Rolling stock of the United States

• Articles with short description
• Short description is different from Wikidata
• Use mdy dates from November 2023