Three of the diesel locomotives Caltrain retired when it went electric are back at work on the other side of the Bay — and instead of rusting in a rail yard, they now generate roughly $2.14 million a year for the agency under a five-year lease that props up Amtrak's fast-growing Capitol Corridor service.

When Caltrain finished electrifying its San Francisco–San Jose spine, it was left with a fleet of serviceable diesels it no longer needed — equipment that would ordinarily head to the scrapper. Rather than eat the loss, its board approved leasing three F40PH-2C locomotives and 16 Bombardier cars to Caltrans, which put them into Capitol Corridor service between San Jose and Sacramento. The deal, laid out in Caltrain's own board filings and first reported in detail by Streetsblog San Francisco, turns a stranded asset into recurring revenue while giving an intercity line straining under record ridership the backup equipment it needs to run reliably.

When Caltrain switched on its electric trains between San Francisco and San Jose, it solved one problem and created another: a fleet of serviceable diesel locomotives with nowhere to go. Most agencies in that position scrap the old equipment or pay to store it. Caltrain found a tenant.

Under a five-year lease its board of directors approved in September 2025, three of Caltrain's F40PH-2C diesel locomotives, three Bombardier cab cars and 13 Bombardier coach cars were transferred to the California Department of Transportation and entered service in May on Amtrak's Capitol Corridor route between San Jose and Sacramento. The financial terms, reported by Streetsblog San Francisco: $12,300 per locomotive per month, $10,000 per cab car and $8,600 per coach car — about $2.14 million a year flowing back to Caltrain.

The money is only half the benefit for Caltrain. According to the staff report the Peninsula Corridor Joint Powers Board approved on Sept. 4, 2025, the lease also relieves the agency of roughly $500,000 a year in maintenance, inspection and insurance it would otherwise pay to keep the idle equipment ready — costs that shift to Caltrans and the corridor operators. The agreement runs five years and can be ended on 90 days' written notice, the filing states.

"It is going to give Caltrain a little bit of funding, and it's going to give us additional reliability and flexibility," Robert Padgette, managing director of the Capitol Corridor, told Streetsblog.

The reliability piece is the part that matters for riders. The Capitol Corridor's own fleet of F-59 locomotives is due for a "much-needed midlife overhaul," Padgette said — a rebuild that replaces nearly every moving part and effectively resets a locomotive's clock, but which pulls units out of service while it happens. The leased Caltrain engines fill those gaps and give the corridor a bench of backup equipment when something breaks down mid-run. "We are leasing the three locomotives to give us the flexibility to pull F-59s out of service as they undergo a much-needed midlife overhaul program," Padgette said. Caltrans is managing the overhaul contract, and the rebuilt units come back as good as new, deputy managing director Leo Sanchez told the outlet.

The timing is not incidental. The Capitol Corridor is one of the busiest intercity rail lines in the country and it is getting busier — ridership is up more than 20 percent year over year, Padgette said. The line directly serves Levi's Stadium in Santa Clara, and the FIFA World Cup crush pushed it past 6,000 passengers in a single day for the first time since the pandemic. The agency confirmed the surge on its own channels, touting that it "moved thousands" during World Cup matches and rolling out special service for stadium concerts through the summer. A line adding riders that fast cannot afford to have locomotives sidelined for maintenance with no replacements on hand.

The equipment does not serve the Capitol Corridor alone. It is available, when needed, to the state's San Joaquin service — recently rebranded the "Gold Runner" — running to Bakersfield, and Caltrain's board report frames the diesels and cars as a shared pool for Central Valley and East Bay operators wrestling with equipment shortages. There is a modest catch for passengers: the leased Bombardier cars have no cafe, so Padgette said the corridor would likely confine them to the Oakland–Sacramento stretch while it works out onboard food and drink service.

The deal is a small case study in a point transit advocates have made for years: sticking to standard, off-the-shelf rolling stock keeps equipment useful long past the life of any single operator. Caltrain's cast-offs are propping up Amtrak service today; the Capitol Corridor's own newer diesels could someday move on to another line. "If we ever do go to zero emissions, I hope we can share our Tier 4 locomotives and help reduce emissions all over the country," Padgette said.

For Caltrain, the calculation is simpler. Electrification left it with diesels it no longer runs and no reason to keep warehousing them. The lease books $2.14 million a year against the cost of the transition, sheds another half-million in carrying costs, and keeps a set of Bay Area workhorses on the rails a while longer. As Padgette put it: "It's a win-win for transit and intercity rail in the region."