A tractor-trailer driver is in critical condition after an accident near Exit 15 southbound on Interstate 89.
Four cars collided and the trailer went over the guard rail onto the bank of the Winooski River around 9 p.m. Monday.
Police say a Jeep hydroplaned, crossed into the center lane, and was hit by a pickup truck, which stopped in that lane. Another car hit the truck and it was then hit by the tractor-trailer, which crashed through the guard rails, dangled over the edge, and then fell.
Vermont State police say the driver of the tractor-trailer, who is from Quebec, suffered serious head injuries. The drivers of the three other cars and their passengers suffered non-life-threatening injuries.
The interstate was closed for hours, but now one lane is open for travelers.