More than a dozen crashes were reported on I-395 in Putnam.
State police blame some snow for making the conditions slick.
They said they counted 15 crashes as of 10:15 a.m.
The Department of Transportation said one crash involved overturned vehicle in the vicinity of exits 97 and 98 on the northbound side.
There's no word on injuries or an official cause.
Early Warning Pinpoint Doppler spotted a snow squall in the area that may be making for some slick driving conditions. Meteorologist Mark Dixon said the squall could leave a coating of snow.
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