Motorists entering Manhattan’s busiest neighborhoods will now have to pay up to $9 in congestion charges, as New York City’s first-in-the-nation Congestion Relief Zone officially launched Sunday.

Drivers who obscure their plates or otherwise circumvent paying tolls already cost the city’s mass transit system millions of dollars.

Drivers entering Manhattan on Jan. 5 now pay a $9 toll as part of a revised congestion relief plan that was approved by the MTA board. While most drivers will pay the full announced price, some vehicle owners could qualify for discounts and exemptions.