The idea is to charge more for driving on the most congested streets in the city and direct those funds to making mass transit more efficient and perhaps even pleasant.
congestion pricing Archives - State of the Planet
Solving the transit problem is key to New York City’s health and well-being, and a new congestion pricing proposal is serious starting point.
To combat urban air pollution and traffic problems, some propose congestion pricing as a cost-effective policy to reduce pollution and improve productivity through improved travel speeds. Cities in China could implement this policy and ameliorate some of the negative effects of congestion-caused pollution. So why is congestion pricing dead on arrival in China?