The Lieutenant William F. Callahan Tunnel carries traffic from Boston, Massachusetts's North End to Logan International Airport and Route 1A in East Boston. Ordinarily, this tunnel is only used to carry traffic out of the city and with the completion of the Big Dig it only collects traffic from I_93 southbound and downtown Boston. Traffic from the airport and Route 1A towards downtown Boston and I_93 northbound normally flows in the older, parallel Sumner Tunnel.
Traffic flowing between the airport and directions south of the city on I-93 and west of the city on the Mass Pike (I_90) normally uses the Ted Williams Tunnel rather than either the Callahan or Sumner Tunnels.
The tunnel was opened in 1961. The tunnel was named for Lieutenant William F. Callahan Jr., son of the Mass Pike's chairman at the time, who was killed in Italy just days before the end of World War II.
The Lieutenant William F. CallahanTunnel is one of four tunnels beneath Boston Harbor.
Ordinarily, this tunnel is only used to carry traffic out of the city and with the completion of the Big Dig it only collects traffic from I-93 southbound (right after traffic merges from Storrow Drive) and downtown Boston.
The tunnel was named for Lieutenant William F. Callahan Jr., son of the Mass Pike's chairman at the time, who was killed in Italy just days before the end of World War II.