No one was injured in the 6:40 a.m. crash.
State police said the SUV, operated by Bok Kim, 57, of Windham, was rear-ended by a tanker operated by Dany Brassard, 44, of Quebec, Canada.
Brassard was inattentive and following too closely so when the SUV slowed down, his truck rear-ended it, a state police news release said.
Speed and alcohol do not appear to be factors in the crash.
Both vehicles were towed from the scene. About 50 feet of steel guardrail was damaged.
The crash is under investigation by Trooper Natalie Glisson of Troop B in Bedford.