An overturned tractor trailer venting a vapor cloud closed both sides of Interstate 395 in Plainfield Thursday morning.
It happened around 1:30 a.m., according to state police.
The northbound and southbound lanes were closed between Exit 24 in Griswold and Exit 28 in Plainfiled, according to Plainfield Fire Co. #1.
The tanker truck was carrying liquid nitrogen and was leaking, creating a vapor cloud in the area.
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Liquid nitrogen is an inert gas that is not flammable and is non-poisonous, according to fire officials.
Hazardous materials experts were at the scene to help deal with the venting gas, they said.
There is no word on any injuries. The highway reopened shortly before 11 a.m.
