If implemented, the toll would apply to motorists entering Manhattan’s central business district, which runs from 60th Street to the southern end of the island. New York City is the world’s most-congested urban area, according to INRIX Inc., a traffic-data analysis firm.

The goal of congestion pricing is to reduce the number of the vehicles in the district by 17% and improve air quality. It may be difficult to hit those targets with a lower $9 toll because it may fail to persuade commuters and visitors to use public transportation rather than cars to get into Manhattan.

The tolling program could still face risks even after Trump takes office. Brad Lander, New York City’s comptroller — who supports congestion pricing and has been push Hochul to restart it — warned that the incoming administration could try to end the program through litigation or administrative action.