Dover Project Overview

The purpose of this project is to convert the two toll plazas on the Spaulding Turnpike (NH 16) – in Dover and in Rochester – to All Electronic Tolling (AET) facilities. The Frequently Asked Questions section of this website at https://www.nhaet.com/faqs/ provides more information on the benefits of AET and what this change will mean to you.

Construction and Traffic Updates

There are no construction and traffic updates at this time.

Construction Tasks

  • The road in the vicinity of the Dover toll plaza area will be reconstructed to three lanes in each direction to accommodate AET and open road travel along the turnpike.
  • The existing road width at the plazas themselves will be reduced to meet the needs of the three-lane facility.
  • Pavement surfaces through the entire project area will be reconstructed.
  • Photo of an AET gantry structure.Existing parking lots will be removed.
  • A concrete barrier will be placed in the median beginning at the south end of the project area and continue north to where the concrete barrier will meet the existing median treatment (w-beam guardrail in Dover).
  • The Dover plaza requires demolition of the eight existing tolling lanes, seven concrete barrier islands and toll booths, canopy, and all connected appurtenances.
  • The toll plaza administration building and the equipment building will be demolished, and the tunnel decommissioned.
  • The proposed AET gantry will support overhead electronic toll collection equipment, which will “go-live” once installed and tested.  To support the transition to AET, overhead signs will be installed on the approaches to make it clear to travelers that tolls can be paid by electronic or invoicing means only.
  • Intelligent Transportation Systems (ITS) technologies will be constructed between Exits 6 and 8 in Dover at three separate locations.  The installations will include two Closed Circuit Television (CCTV) towers and one Dynamic Message Sign (DMS). 
Dover Project Plans

Traffic Impacts

Traffic impacts are expected over two construction seasons (see schedule below) and will include multi-phase construction operations at both sites.  Nighttime operations are anticipated at both sites for operations such as paving, plaza/canopy removals, and gantry installations.  General traffic control operations will consist of lane shifts, lane reductions, installation of a portable concrete barrier, attenuators, and temporary lighting.

    Meeting Information

    A virtual public meeting took place February 17th. 

    Schedule Information

    The project will be developed as a single contract, including improvements at both locations. The projected advertising date for this project is summer of 2021.

    Construction will affect traffic during 2022 and 2023.

    The AET conversion will be available for travelers in summer 2022, and all construction will be completed in fall 2023 at both sites.

    Contact Us

    If you have a question on this project, please send us an email at: Nancy.L.Spaulding@dot.nh.gov

    For more details on this project, go to https://www.nh.gov/dot/projects/doverrochester29440/index.htm