Basis of Payment Replace Section
5.2.1 with the following section:
5.2.1 Removing traffic sign will be paid for at the Contract unit price per each unit.
SECTION 616 - TRAFFIC SIGNALS
Description Section 1.1, revise
in its entirety to read as follows:
The work to be done related to traffic signal installation consists of furnishing and installing a new traffic signal mast
arm assembly at the northeast corner of the intersection of Daniel Webster Highway and Graham Drive, complete
with vehicle detection (video cameras), signal heads, foundation, conduit and all necessary fittings, wire and cable,
and all other equipment, materials and incidental costs necessary to furnish, install and program a complete and
functioning traffic control system as specified and as shown in the contract documents.
The Contractor shall note that the City of Nashua specifies Eagle Traffic Control Systems (ETCS) products in its traffic
control signal systems. Traffic signal equipment specified for this project shall be as manufactured by ETCS or
compatible with ETCS equipment. The proposed Video Detection Cameras shall be compatible with the existing Video
Detection System, and shall tie into the existing Video Detection System.
The existing signal installations to be removed and stacked under Item 616.101 shall be maintained in operation
throughout the construction period and until the new signal system is ready for operation. The contractor may install
temporary supports for signal heads as necessary to allow for construction activities. Any temporary installation shall
be in conformance with the MUTCD in every case. If an existing signal is to be turned off temporarily to allow
controller switchover or requiring temporary turn- off, a police detail(s) shall be used to control traffic at the
intersections until stop-and-go operation is restored.
The work shall also include the removal, transporting and stacking at the Nashua Department of Public Works
maintenance yard of certain individual parts of the existing traffic signal equipment. The items to be removed and
stacked shall consist of the signal heads and lenses (complete), signal posts and bases, and aluminum mast arms,
poles and bases. The work shall also include the excavation and backfilling with compacted gravel of the holes
resulting from the excavation of the foundations and the replacement, in kind, of any surface material disturbed. All
work under these items shall conform to the relevant provisions of Section 616 of the 2016 NHDOT Standard
Specifications, the 2009 Manual on Uniform Traffic Control Devices (MUTCD), the 2010 Standard Plans for Road
Construction and the following technical provisions.
Add Section 2.1.3 to read as follows:
2.1.3 List of Major Materials:
2 - Video Detection Cameras (Tie into existing camera system).
5 - One-way, three-section, 12-inch aluminum signal heads with LED modules type, mounted on mast arms,
with 5-inch louvered back plates.
1 - Galvanized steel 45-foot mast arm assembly with Luminaire.
Location: Northeast Corner of Daniel Webster Highway @ Graham Drive
Construction Specifications.doc 8-6
