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Tappan Zee Bridge/I-287 Environmental Review


The Tappan Zee Bridge/I-287 Corridor Project is being conducted in accordance with all applicable federal and state requirements, including the:

The study process includes:

Alternatives Analysis (AA)

The Alternatives Analysis process, completed in January 2006, identified more than 150 suggestions on how to improve conditions in the Tappan Zee Bridge/I-287 Corridor. After further investigation, those 150 suggestions were combined into 16 different scenarios that were analyzed for their environmental impact, constructability, cost and ability to improve mobility in the I-287 Corridor. The six alternatives that remained at the end of the Level 1 and Level 2 screening processes are detailed in the Alternatives Analysis Report.


The scoping process began on December 23, 2002 with the publication of the Notice of Intent (NOI). Scoping meetings were held and the information that was gathered was utilized to develop potential alternatives and identify potential impacts. While the project activities advanced, the Safe, Accountable, Flexible and Efficient Transportation Equity Act: A Legacy for Users (SAFETEA-LU) was signed into law on August 10, 2005, refining the environmental review process under National Environmental Policy Act (NEPA) and increasing the opportunities for public involvement.

In response, a revised NOI was issued in February 2008, commencing the Scoping Update process. This process provided additional opportunity for public comment on the topics of Purpose and Need, Range of Alternatives, and the Coordination Plan as required by SAFETEA-LU using the Scoping Update Packet. Three Scoping Update Meetings were held in Westchester, Rockland and Orange Counties in February 2008.

Recommendations concerning bridge replacement and transit modes were made at the end of 2008 in conjunction with public information meetings and a comment period. The results of this Level 3 screening are documented in two reports:

  • Rehabilitation and replacement of the Tappan Zee Bridge as documented in the Alternatives Analysis for Rehabilitation and Replacement of the Tappan Zee Bridge report, March 2009. Replacement of the bridge is recommended.
  • Selection of a transit mode (as documented in the Transit Mode Selection Report, May 2009). A cross-corridor bus rapid transit (BRT) system is recommended from Suffern, NY to Port Chester, NY and a commuter rail transit (CRT) system is recommended across Rockland County (from Suffern, NY), across the replacement Tappan Zee Bridge, with a direct connection to the Hudson line in Tarrytown for the service to Grand Central Terminal.

The Scoping Process was concluded in May 2009 with the official publication of the Scoping Summary Report — which identified potential alternatives to be evaluated in the EIS and provided responses to public comments — and the Scoping Comments Report.

Bridge, Transit, and Highway Options

Since the closure of scoping, the team has held dozens of municipal and community working meetings to obtain public input on various transit and highway alignment and bridge configuration options under consideration. After further study, the team presented its findings in two open houses held in Westchester and Rockland Counties in the summer of 2010.

The Project team will continue to meet with the public throughout this process and we encourage and welcome your feedback.

Look Ahead

  • Publish Transit Alignment Options Report
  • Publish the Bridge Options Development Report
  • Publish Highway Improvements Report
  • Prepare the DEIS
  • Continue engaging with the public through a variety of
    meetings and events

Each step in the EIS process includes efforts and activities
designed to gain public input.

Learn how to: Participate in the study