Manhattan, the central borough of New York City, will soon charge motorists a congestion toll. Plans are to implement the toll by December 2020.

The measure, which is meant to reduce traffic congestion, cut pollution and encourage use of mass transit, was passed by state lawmakers as part of the state budget on April 1.

Initial plans are that a toll, which is expected to be more than $10 per car, will be applied to those opting to drive their own cars into the city below 60th Street, just south of Central Park. Although still yet to be determined, part of the proposal suggests that license plate readers could be used to enforce the toll and bill those vehicles.

Similarly, other details of the scheme still need to be worked out by a committee called the Traffic Mobility Review Board. That panel will be tasked with setting toll prices as well as setting possible exemptions and credits for qualifying drivers. The revenue stream anticipated from the plan will be used in part for modernizing the current subway system as well as bus services.

Already in effect in other cities across the globe, including London, Singapore and Stockholm, congestion tolls have resulted in reduced traffic, improved air quality and an increased revenue stream to support public transportation.

Yet concerns are that in Manhattan, motorists will opt for absorbing a daily toll or will instead opt for services like Uber and Lyft, instead of taking the subway, thereby eliminating any potential environmental gains to be had from tolling motorists.

Explaining his support for the scheme, New York City Mayor Bill de Blasio said: "I endorsed congestion pricing because I knew — if done right — it was our best hope at getting the trains moving and ending the suffering our riders face every day. This budget represents a giant step in the right direction. With a guaranteed lockbox for New York City riders, fairness for the outer boroughs, and exemptions for people experiencing hardships, I am confident this dedicated revenue stream will go a long way toward fixing the MTA's broken subway system."

To contact the author of this article, email mdonlon@globalspec.com