President Donald Trump's administration on Wednesday ordered a halt to New York City’s congestion pricing system, which thins traffic and funds mass transit by imposing high tolls on drivers entering some parts of Manhattan.

Launched on Jan. 5, the city’s system uses license plate readers to impose a $9 toll on most passenger cars entering Manhattan neighborhoods south of Central Park. In its early days, transit officials say the toll has brought modest but measurable traffic reductions.

That charge comes on top of what drivers already pay to use bridges and tunnels to get onto the island. Drivers who take a tunnel in from New Jersey during peak commuting hours now pay $31.81, or a discounted rate of $22.06 if they are enrolled in the E-ZPass toll collection program.

In a statement, U.S. Transportation Secretary Sean P. Duffy announced the federal government has rescinded its approval of the program, calling it “slap in the face to working class Americans and small business owners.” Duffy said his agency will work with the state on an “orderly termination of the tolls.”

Similar tolling programs intended to force people onto public public transit by making driving cost-prohibitive have long existed in other global cities, including London, Stockholm, Milan and Singapore, but the system had never before been tried in the U.S.

MTA Chair and CEO Janno Lieber says the agency has already filed a lawsuit aimed at keeping the congestion pricing program alive.

“It’s mystifying that after four years and 4,000 pages of federally-supervised environmental review — and barely three months after giving final approval to the Congestion Relief Program — USDOT would seek to totally reverse course,” Lieber said.

Trump, whose namesake Trump Tower penthouse and other properties are within the congestion zone, had vowed to kill the plan as soon as he took office. He previously characterized it as a massive, regressive tax.

“It will be virtually impossible for New York City to come back as long as the congestion tax is in effect,” Trump said in November as New York prepared to implement the plan before he took office.

Revenue from the tolls is intended to raise billions of dollars in revenue for the city’s creaky and cash-strapped transit system, which carries some 4 million riders daily.

The tolling system has been divisive. Transit advocates and environmentalists have heralded it as an innovative step to reduce air pollution from vehicle exhaust, make streets safer for pedestrians and bikers, while speeding up traffic for vehicles that truly need to be on the road, like delivery trucks and police cars.

But the high tolls are hated by many New Yorkers who own cars, particularly those that live in the suburbs or parts of the city not well-served by the subway system.

New Jersey Gov. Phil Murphy, a Democrat, had fought the tolls and court and wrote a letter Trump on Inauguration Day imploring him to kill the program.

New York Gov. Kathy Hochul also had misgivings. Last June, she abruptly halted the tolling system’s planned launch, citing concerns about its impact on the local economy. The Democrat then revived the toll in November following Trump’s election, but reduced the toll for passenger vehicles from $15 to $9. Since then, she has lauded it as a win for the city and has discussed the issue multiple times with the president

The tolling plan was approved by New York lawmakers in 2019, but stalled for years awaiting a required federal environmental review during Trump’s first term before being approved by the administration of President Joe Biden.

As in other cities, the New York congestion fee varies depending on the time and the size of the vehicle. Trucks and other large automobiles pay a higher rate, and the fee goes drops to $2.25 for most cars during the quieter overnight hours.

The toll survived several lawsuits trying to halt it before its launch, including from the state of New Jersey, unionized teachers in New York City, a trucking industry group and local elected leaders in the Hudson River Valley, Long Island and northern New Jersey.