SACRAMENTO — More than a month after the Trump administration moved to rescind $4 billion in expected funding, the future of California’s high-speed rail project remains uncertain.

The money hasn’t been reallocated yet, and California is challenging the decision. But the attempted funding cut has reignited long-standing doubts about whether the nation’s most ambitious rail project can still deliver on its promise.

The project has always carried outsized ambitions. When voters approved a $10 billion bond for the project in 2008, the plan was to connect Los Angeles and San Francisco in under three hours via fully electric-powered high-speed rail by 2020, at a cost of $33 billion.

Then, in a second phase, the system would be expanded up to Sacramento and down to San Diego.

Since then, it’s been battered by delays, lawsuits and escalating costs to potentially over $100 billion. Its first operable segment in the Central Valley — a 172-mile stretch between Merced and Bakersfield slated to open in 2033 — is far from the original vision and the $14 billion needed to close the funding gap by June 2026 remains elusive.

President Donald Trump has lambasted the project as a “boondoggle” and a “high- speed train to nowhere.”

“We’re not going to fund that ... it’s out of control,” Trump said at a news conference. “It doesn’t go where it’s supposed to.”

A 310-page federal oversight report in June described it as a “Sisyphean endeavor” — a characterization Ian Choudri, CEO of the High-Speed Rail Authority, called misleading. Critics, particularly from libertarian and fiscally conservative think tanks, have long derided the plan as overly ambitious and unnecessary. Even former state officials involved in the project have publicly voiced regrets and frustrations.

Yet the project still has powerful defenders — Gov. Gavin Newsom, major labor and environmental groups and many transit experts — who argue that despite early mistakes, the state can’t afford to walk away.

California has sued, challenging Trump. “It’s yet another political stunt to punish California,” Newsom said in a news release.

As of August, over 463 miles of track have cleared environmental review and are construction ready, and roughly 119 miles are currently under construction between Shafter and Madera, according to authority spokesman Kyle Simerly.

Supporters say the rail line offers a climate solution, a transportation backbone for a growing state and a long-overdue shift in American travel habits. It has also generated more than 15,500 construction jobs — most filled by Central Valley residents, according to Simerly.

Yet with the project scaled down and skepticism rising over ridership and returns on investment, the federal government’s threat to pull $4 billion in funding raises unavoidable questions about whether the project’s demand still justifies its cost.

high-speed rail costs

High-speed rail is expensive — and everything is getting more expensive. Andy Kunz, president of the U.S. High Speed Rail Association, said, “Everything is just making this upwards creep — labor, insurance, cement, steel.”

The project faces geometric constraints as its gradients have to be much less steep than highways, Lou Thompson, former rail authority peer review group chair, said. This limits their route flexibility, and the plan’s linear nature means it intersects with many jurisdictions.

Environmental review laws, such as the National Environmental Policy Act and the California Environmental Quality Act, add years to the timeline and open the door to litigation. Though well-intentioned, “they’re used by not-in-my-backyard people to stop projects,” said Baruch Feigenbaum, senior managing director of transportation policy at the libertarian think tank Reason Foundation.

Some mistakes were self-inflicted. Pressure to spend federal stimulus funds led the authority to begin construction before it had final designs or full clearances, resulting in costly overruns, Thompson said.

Others argue the state missed a major opportunity: routing the line along the Interstate 5 corridor could have reduced costs by using existing federal right-of-way and bypassing dense urban areas. But that idea was set aside for political reasons — to secure support from Central Valley voters and lawmakers, said Ethan Elkind, an attorney and environmental law expert at UC Berkeley.

The project has also been plagued by its heavy reliance on outside consultants — a symptom of the underdeveloped in-house infrastructure delivery capacity compared to other nations.

tough choices

The authority’s 2019 Equivalent Capacity Analysis Report estimated upgrading highways and airports to match high-speed rail’s planned capacity would cost $122 billion to $199 billion.

The comparison has limits, several experts noted: It weighs two fundamentally different kinds of builds. Though high-speed rail requires constructing entirely new corridors, they’re often running through rural land, but highway and airport expansions typically retrofit complex urban spaces — a far messier, costlier task. Airports in San Francisco and Los Angeles are hemmed in by urban development, and widening highways like Highway 99 would carve through cities and require expensive land acquisitions, Elkind said.

Closing the gap

The loss of $4 billion in federal funding leaves California scrambling to fill a deep financial gap of $14 billion to even finish the Central Valley corridor.

Thompson, the former peer review group chair, stressed the urgency of retrieving the federal funding or finding new state funding. Without that, even the Merced to Bakersfield line may be a pipe dream. “If we in California want to do this, we’re going to have to figure out how to pay for it,” he added.

So far, the project has been funded largely through California’s cap-and-trade program, which auctions a limited number of emission permits to companies. Proceeds from this have raised about $6.4 billion for the project from 2012 to 2023. Newsom has proposed expanding this program to guarantee a minimum of $1 billion of state funds per year through 2045. The Authority has turned to private investors for financial support and feedback and began fielding expressions of interest in June.

“Being able to point to an ongoing stream of committed state funding is going to be really critical,” said Petty.

And to address delays from the regulatory process, SB 445, a bill moving through the Assembly from Sen. Scott Wiener, would set strict timelines and coordination rules for outside agencies to streamline permitting and keep high-speed rail construction on track.

But Reason Foundation’s Feigenbaum is more pessimistic. He believes private investment won’t come forth until there’s proven demand.

Feigenbaum argues the project continues largely for symbolic reasons and because of political pressure. He believes high-speed rail might still succeed in the U.S., but only in denser, shorter corridors like the Northeast. If California were to abandon its current effort, he said, the right-of-way could be repurposed — for housing, linear parks, or trails.

But Kunz, the president of the US High Speed Rail Association, points to the 400 miles of track that have already cleared environmental review — an “enormous amount of work” that just isn’t physically visible. “The authority is ready to move fast when the money arrives,” he said.

In theory, infrastructure costs should drop after the first phase as construction becomes more efficient, though that’s far from guaranteed, said Goldwyn, the NYU researcher. Some U.S. projects, like L.A. Metro’s Red Line, saw later phases come in cheaper, but others — such as New York’s Second Avenue Subway — have only grown more expensive. For California’s high-speed rail, costs are expected to climb as construction moves into denser, more complex areas like Los Angeles and San Francisco, he said.

Even so, some over-budget infrastructure projects have delivered major long-term value. Boston’s Big Dig, which buried a central highway underground, was infamously plagued by cost overruns but eventually transformed the city’s urban landscape and boosted the economy.

Whether California’s high-speed rail follows that path — or becomes a cautionary tale — remains to be seen.