The southbound lanes of Route 1 in Falmouth were closed Thursday morning near the intersections with Webber Way and Greenway Drive after an accident involving a Honda Civic and a U.S. Postal Service truck. The Civic, driven by Lisa Corson, 40, of Falmouth, reportedly rear-ended the mail truck, pushing it into a utility pole, and then flipped on its side. Police said there were no life-threatening injuries, but emergency responders had to cut off the roof of the car to remove the driver. Both Corson and the driver of the mail truck, John McLean, 61, of Portland, were transported to Maine Medical Center for treatment.