congestion pricing

The practice by municipalities of installing a fee structure for the use of motorways, bridges or tunnels during high use periods for the purpose of moderating traffic flow. Congestion pricing, which is based on simple supply and demand principles, has been used effectively in high density urban centers such as London and Stockholm that use electronically-collected toll systems . In the U.S. it has been limited to high-occupancy toll roads with mixed results in reducing traffic flow on non-toll highways.