MassDOT is closing some lanes and ramps this week to test wrong way vehicle detection systems.
Each of the closures will run from 10 p.m. to 4 a.m. the next morning.
Som eof the closures happening this week are on I-93 north near Exit 17, the Mass Pike east near exit 135, and Route 3 south near exit 183 in Chelmsford.
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