Facts & Info
Width of each tunnel roadway: 21 feet, 6 inches
Operating headroom: 13 feet
External diameter of tunnel: 31 feet
Maximum depth from mean high water to roadway: 97 feet
Length of tunnel (portal to portal)
North tube: 7,482 feet
Center tube: 8,216 feet
South tube: 8,006 feet
Number of toll lanes: 13
Opened to traffic
North tube: February 1, 1945
Center tube: December 22, 1937
South tube: May 25,1957
