From
www.massport.com - keeping in mind none of these detours avoids ALL tunnels:
ALTERNATE ROUTES TO/FROM LOGAN
When entering the Airport, note that the inbound roadway system consists of an upper level for departures and a lower level for arrivals. All parking is accessed from the roadway on the lower/arrivals level.
Passengers are being detoured to alternate routes. Therefore, Massport is urging all Logan travelers to use public transportation whenever possible. For alternative routes to Logan Airport see below:
Alternate Routes ARRIVING TO Logan Airport
From the South:
Option 1: Follow I-93 North over Leonard Zakim Bunker Hill Bridge. Exit left at Exit 27, Route 1 North/Tobin Bridge. Cross Tobin and take first exit, Beacon Street/Chelsea Waterfront. Go straight off the Beacon Street ramp onto Chestnut Street. Take a right at the first set of lights onto Williams Street. Follow orange Logan Airport detour message boards and signs to access Logan Airport.
Option 2: Take I-93 North to Exit 23. Follow signs to Callahan Tunnel and Logan Airport.
From the North:
No Detours, use I-93 South to Exit 24B (Airport) or Route 1A South to Logan Airport.
From the West:
Take I-90 East to Exit 24B to I-93 North and use either Exit 23 or Exit 27. Follow the Logan Airport detour signs to access Logan Airport and East Boston through the Callahan Tunnel or Tobin Bridge. An alternate I-90 Eastbound route is to use Exit 18 (Allston/Cambridge) to Storrow Drive and either follow I-93 South to Exit 24B (Airport) or the Tobin Bridge.