How long is the bridge between the Virginia mainland and that little spit of land stuck to Maryland?
The Bridge-Tunnel project is a four-lane 20-mile-long vehicular toll crossing of the lower Chesapeake Bay. The facility carries US 13, the main north-south highway on Virginia’s Eastern Shore, and provides the only direct link between Virginia’s Eastern Shore and south Hampton Roads, Virginia. The crossing consists of a series of low-level trestles interrupted by two approximately one-mile-long tunnels beneath Thimble Shoals and Chesapeake navigation channels.
http://www.cbbt.com/facts.html