Office of Operations
photos of traffic merging onto congested highway, congestion in snowstorm, variable message sign, cargo, variable speed limit sign in a work zone, and a freeway at night
21st Century Operations Using 21st Century Technologies

Traffic Bottlenecks

Combating Bottlenecks

New Hampshire

Advancing part of larger project to clear up a mess sooner than later.

Background: 19.8 miles of I-93 is scheduled to be modernized and widened from two to four lanes; 44 bridges will be widened, reconstructed, or replaced; five interchanges are inclusive; sound barrier will be added in some places; three new park and ride lots will be constructed; expanded bus service will serve this corridor; additional improvements to storm water runoff and R/W for future light rail will be made.

Bottleneck Project: The State of New Hampshire has selected work at Exit 5 (Londonderry) on I-93 to be expedited in order to address the bottlenecking concerns which currently exist. The signalized NB and SB ramps back up onto the mainline during peaks. The original project called for much of Exit 5 to be reconstructed in FY 2009. In partial response to the LBR program attention, improvements to two of the existing ramps are being expedited. The SB off ramp at Exit 5 will be extended. The shoulder area on the mainline will be widened and reinforced to hold some of the queue. The signal at the top of the ramp will be coordinated with loop detection. Reconstruction or widening of two nearby bridges will be accomplished. The estimated cost of this expedited work is $9.13M. The completed project will meld into the overall 19.8 mile I-93 project.