New York City’s transit system started charging motorists on Jan. 5 a fee to drive into crowded midtown Manhattan. The aim of this congestion pricing initiative, the first in the US, is to reduce traffic and pollution while raising money for the city’s subways,

The president made his power to shut down the tolling system sound absolute. But legal experts say the law may not be in his favor.

New York became the first city in the U.S. to implement congestion pricing, with funds s set to fund much-needed repairs to the MTA.