It seems weary commuters will have to wait four more months before they can start using the Sarah Mildred Long Bridge between Portsmouth and Kittery, Maine. The lift-span bridge will now be open to traffic in mid-May, eight months after cars were supposed to start using it to cross the Piscataqua River, according to an updated construction schedule from Cianbro, the Pittsfield-based construction company hired by the state of Maine to build the bridge. Cianbro spokesman Alan Grover did not return a interview request Tuesday to explain why bridge construction has been delayed. Cianbro started construction on the $160 million...