Reducing congestion, improving safety, and promoting economic vitality for the towns of Derry & Londonderry, New Hampshire

The Towns of Derry and Londonderry (the Towns) and the New Hampshire Department of Transportation (NHDOT), in cooperation with the Federal Highway Administration (FHWA), are advancing an updated environmental study for the I-93 Exit 4A Project (Project). The Project consists of a new diamond interchange on I-93 in the Town of Londonderry, approximately one mile north of Exit 4. The new diamond interchange would provide access to the east side of I-93. A 1-mile connector roadway would be built on new alignment from the interchange to Folsom Road, near the intersection of North High Street and Madden Road, in the Town of Derry. Folsom Road, and subsequently Tsienneto Road, would be upgraded, and the intersections would be improved. In total, the Proposed Project corridor from I-93 to the intersection of Tsienneto Road and NH Route 102/Chester Road would be 3.2 miles. The purpose of the Project is to reduce congestion and improve safety along NH 102, from I-93 easterly through downtown Derry and to promote economic vitality in the Derry/Londonderry area.

Planning for the Project began in 1985, with a Draft Environmental Impact Statement (DEIS) being completed in 2007. A Public Hearing on the DEIS was held on September 12, 2007. In October 2015, the Governor's Office directed NHDOT to accelerate the Exit 4A Project, and the Project was subsequently incorporated in the state’s Ten Year Transportation Improvement Plan for 2017–2026. NHDOT and the Towns entered into an agreement under which NHDOT will provide administrative oversight to complete the environmental review process, then the Project will transition to NHDOT control during final design and construction.

Due to the amount of time that has elapsed since the 2007 DEIS, the FHWA has requested the preparation of updated studies that will be documented in a Supplemental Draft Environmental Impact Statement (SDEIS) in accordance with the National Environmental Policy Act (NEPA). These updated studies and documentation began in June 2016. The SDEIS will provide an up-to-date assessment of the environmental effects of the Project and the evaluation of reasonable alternatives that will consider updated information including  but not limited to, traffic, socioeconomic projections, land development proposals in the project area, and changes in environmental resources and regulatory requirements. After completion of the SDEIS and the presentation of a Preferred Alternative at a Public Hearing, a Proposed Action will be chosen with input from State and federal Agencies; State, Town and local officials; and the public. NHDOT and FHWA will complete the NEPA environmental review process by issuing a Combined Final EIS (FEIS) and Record of Decision (ROD).

Construction of the Project is anticipated to begin in 2019 and be completed by 2022. The programmed cost of the Project within the 2017–2026 Ten Year Plan is $56,855,000, including preliminary engineering, right-of-way, and construction costs.


The revised engineering layouts for the alternative alignments have been completed. Impacts from the No Build and Build Alternatives are being evaluated.



NEW - Public Officials/
Public Information Meeting on 7/25/2018

A Combined Public Officials/ Public Information Meeting and  Public Hearing for Use of Design-Build Procurement will be held on Wednesday, July 25, 2018, at 6:30 PM.
The meeting will be held at the West Running Brook Middle School, 1 West Running Brook Lane in Derry.
The purpose of the meeting is to present the additional detailed information on the preferred alternative and to hold a public hearing on the potential use of design/build procurement for the project. An opportunity for public comments and questions will be provided during the meeting. Members of the project team will also be available to informally discuss the project alternatives and impacts.

Click here for more information about the public information meeting.