WESTWOOD, Mass. – A single-car crash on Route 95 north, south of exit 13, that closed both the northbound and southbound lanes of the highway for an hour so a helicopter could land, continues to tie up traffic.

If you were trying to get to work in the Boston area or to the New England Patriots summer camp in Foxboro this morning and instead spent the whole time sitting in traffic, this is most likely the cause.

At 5:29 a.m. today, an adult male driving a 2003 Toyota Corolla in the middle northbound lane of Route 95 struck a storm drain that had dislodged from the roadway, according to Massachusetts State Police Trooper Thomas Murphy.

The grate bounced up and broke through the Toyota’s windshield, striking the driver. The car then veered across the left travel lane and collided with the median, Murphy said. The man, who was wearing a seatbelt, sustained serious injuries and was taken to Brigham and Women’s Hospital in Boston by helicopter. His condition, name and town of residence are not yet available from the police, Murphy said.

By about 6:30 a.m., the southbound lanes were all opened again, but only the right and breakdown lanes on the northbound side have reopened since the crash, Murphy said.

The left and center lanes will be closed “for an extended period of time,” Murphy said, as an accident reconstruction team continues to investigate.

The accident occurred in a construction zone.

-- projo.com staff writer Kate Bramson