Both lanes of traffic on Interstate 295 north of the Falmouth spur were snarled for nearly six hours Thursday after a tractor-trailer drifted into the median and struck a cable barrier.

The impact of the collision on the northbound side of the highway just before 10 a.m. caused the trailer to detach from the tractor forcing the trailer to land on its side. The contents of the trailer spilled onto the roadway, according to Maine State Police Sgt. Christopher Farley. The truck cab remained upright.

“Traffic was moving, but very slowly for most of the day,” Farley said.

Farley could not confirm what the trailer was carrying, but said the Maine Department of Environmental Protection responded to the crash site.

Farley identified the driver of the truck as 48-year-old Paul Hatch of Lynn, Massachusetts. He was not injured. The tractor-trailer is owned by Commonwealth Waste Transportation of Massachusetts. Commonwealth hauls garbage, according to its website.

It took crews about six hours to remove the wreckage and waste that spilled onto the highway. The Maine Turnpike Authority, which monitors interstate traffic flow, lifting its travel advisory at 4:53 p.m.

No injuries were reported as a result of the crash.