The toll, known as congestion pricing, is meant to reduce traffic gridlock in densely packed Manhattan while also raising money to help fix the city’s ailing public transit infrastructure. It formally took effect Sunday.

The first weekday of New York City's congestion pricing policy saw lighter-than-expected traffic, but questions remain whether the $9 peak-hour toll is responsible. The MTA estimates the fee could keep 100,

The countdown to congestion pricing in New York City is over. Drivers now must pay a toll to enter Manhattan south of 60th Street.

After Gov. Kathy Hochul (D) ordered an indefinite pause of congestion pricing last June, MTA officials paused some plans, including halting work on the $7.7-billion Second Avenue Subway Phase 2. The project, which is the costliest project being funded in part through the toll program, is planned to extend the line 1.8 miles and add three stations.

New York City kicked off the first congestion pricing program in the US, part of an effort to reduce the number of vehicles in the world’s most traffic-clogged urban area while raising money for transit infrastructure.

MTA Chair Janno Lieber said it has been a smooth ride Monday on the first weekday of congestion pricing. Fort Lee's Mayor Mark Sokolich says it's too soon to draw any conclusions.

The program is the target of several lawsuits and of President-elect Donald J. Trump, who said he will end it permanently once he takes office on Jan. 20.

Congestion pricing has finally arrived in New York City after years of political bickering and scores of legal challenges. The first initiative of its kind in the US, the $9 toll for most drivers entering parts of Manhattan during peak hours began Sunday and promises to ease both gridlock and pollution while also raising $15 billion for desperately needed subway upgrades.