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Beginning on Wednesday, July 17, motorists will encounter a new traffic pattern at the I-90/I-95 interchange in Weston. The temporary change is intended to help alleviate traffic congestion. If a two-week trial period proves successful as models predict, the new traffic pattern will be made permanent.

In an effort to develop low-cost bottleneck solutions, MassDOT consulted both the Federal Highway Administration and the Boston Metropolitan Planning Organization. Analysis confirmed the primary sources of congestion at the I-90/I-95 interchange in Weston are the multiple merge points. The bottleneck builds as traffic from I-90 and Route 30 merges onto I-95 Northbound. To address this bottleneck, as seen on the map at bottom, MassDOT will be closing the right lane on I-95 Northbound through a temporary tapered lane closure, just north of the I-95 NB Exit 23-24-25.

Currently, I-95 NB is four lanes wide with the right-most lane carrying thru traffic and vehicles that are merging onto I-95 NB from the Mass Pike and Route 30. This double-merge point causes traffic to back up through the Toll Plaza and onto I-90.

By closing the right lane to I-95 NB travelers, it becomes a dedicated lane for MassPike/Route 30 travelers to merge onto I-95 NB.

A third of all traffic on I-95 NB exits at Exit 23-24-25, and a recent traffic count showed 10 percent of vehicles continuing north on I-95 utilize the right lane. During the trial period, thru traffic on I-95 Northbound should stay to the left.

Motorists will see barrels, cones, and variable message signs deployed for the lane closure on I-95 Northbound beginning on July 17 for a period of two-weeks. During the test, MassDOT will be collecting information to ensure that the new configuration reduces congestion levels as predicted. If the trial period proves successful, MassDOT will make the changes permanent by installing new signs and new lane markings later this summer.

I90I95 Lane Change

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