Unit 4-North (20’ x 60’ faces South bound traffic on heavily traveled Route 1A, 300’ South of Curtis Street. 2500 ft ahead the driver has three choices: (1) to enter Logan International Airport, (2) to take I-90 to the Ted Williams Tunnel (3) To continue on South Bound 1A to Downtown Boston through the Sumner Tunnel. Route 1A is a major communicating route to Boston and Logan International Airport to the South shore. (DEC 52.2)

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