Congestion pricing was introduced on Sunday morning in the center of New York City — despite a late attempt by New Jersey to stop it in court.

Congestion pricing could generate revenue many cities are desperate for, while simultaneously easing traffic and improving air quality. But legal challenges and President-elect Do

Preliminary traffic data is giving promising if occasionally mixed signals for the early days of congestion pricing’s impact on Manhattan’s busiest streets, with travel times down at Hudson River crossings but speeds within the zone slightly slower at key times of day year over year.