A 56-year-old East Hampton man was killed when the tractor-trailer he was driving went down an embankment on Route 9 North in Haddam on Friday morning and hit a tree, according to state police.
Police identified the driver as David Canfield, 56, of East Hampton.
He was traveling northbound near exit 8 just after 6:15 a.m. when the truck traveled into the left shoulder, hit a guardrail and went off the road.
Canfield was alone in the truck and was pronounced dead at the scene.
The highway was shut down between exits 8 and 9 after the crash, but has reopened.
Police are investigating.