LOWELL — A multi-vehicle crash involving tractor-trailers tied up traffic on Interstate 495 southbound prior to Exit 89 Monday afternoon. The Massachusetts Department of Transportation reported a crash with a fuel spill shortly before 1 p.m. Photographs from the scene showed the right lane of the three-lane highway closed, and motorists were advised to expect delays. Lowell Fire Department Ladder 1 and Engine 11, which operate out of the Lawrenc…