The Chesapeake Bay Bridge-Tunnel measures 17.6 miles and is considered the world's largest bridge-tunnel complex. Construction required undertaking a project of more than 12 miles of trestled roadway, two mile-long tunnels,two bridges, almost two miles of causeway, four man-made islands and 5 1/2miles of approach roads, totaling 23 miles. Total Project Cost, Building Time and Opening Dates(No Local, State or Federal Tax Money Used) Nort - $200,000,000 - 42 Months-Opened April 15, 1964. South - $250,000,000 - 46 Months - Opened April 19,1999.
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