New York State Thruway Authority

Tappan Zee Corridor Congestion Relief Initiative

The 15-mile Tappan Zee Corridor, which includes the Tappan Zee Bridge and the Spring Valley Toll Barrier, is the most heavily traveled section of the New York State Thruway. In July 1997, the Thruway Authority made a number of changes that were intended to reduce the amount of traffic in the Corridor and discourage commercial traffic on the Tappan Zee Bridge, especially during rush hours. These changes included eliminating some tolls and raising other tolls for certain types of vehicles at certain travel times. These changes in the Corridor's toll structure were intended to have a revenue-neutral effect. We examined the effects of these actions on the amount of toll revenue collected by the Authority and on the amount of traffic in the Tappan Zee Corridor. We found that the toll changes had a revenue-neutral effect, as was intended, and traffic congestion was virtually eliminated at the Spring Valley Toll Barrier. However, the total amount of traffic on the Tappan Zee Bridge, and the amount of commercial traffic during rush hours, increased slightly.

For a complete copy of Report 98-S-58 click here.
For a copy of the associated follow-up report click here.