To ultimately reconfigure Exit 3 to a diamond interchange, a new southbound off-ramp is being constructed under Contract 13933K, replacing the existing loop ramp. This new ramp, located north of NH Route 111, will help to improve the interchange capacity and improve safety on the mainline. Also, two new bridges to carry the relocated northbound mainline over NH 111 and NH 111A will be constructed, removing two "red list" bridges from service. Construction on this $25M project began in the fall of 2008.
Additional construction will be done under separate contracts. The graphic below shows the Exit 3 area before and after construction.


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