Opened to traffic: November
13, 1927
Width of roadway: 20'
Length of tunnel (portal to portal):
North tube: 8,558'
South tube: 8,371'
Operating Headroom: 12' 6"
External diameter: 29' 6"
Maximum depth from mean high water to roadway: 93' 5"
Number of ceiling tiles 3.1 million
Number of wall tiles 2.9 million
Original Cost of Construction: $48,000,000
Number of toll lanes: 9
PA investment as of December 31, 2008: $587,726,000
2008 Traffic Volumes
Total eastbound traffic: 16,871,000 vehicles
Total traffic (both directions): 33,742,000 vehicles
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