The Callahan Tunnel between downtown Boston and Logan Airport, East Boston and Route 1A will be closed from December 27th through March 12, 2014 for a major roadway project. MassDOT will post detour routes to assist motorists. Specific detour maps can be found at http://www.mass.gov/massdot/callahantunnelrehab. Traffic in this area is expected to be heavy; MassDOT recommends that you plan extra time to reach your destination.