The Harwinton Volunteer Fire Department responded to a head on collision on Burlington Road around 3 a.m. Saturday, the department said. The crash between a car and tractor-trailer occured in front of the Liquor Lad package store. Officials said no one was seriously injured. Route 4 was shut down between North Road and Harwinton Heights Road for about an hour. A fluid spill was cleaned up, but the area is now cleared at this time.