Monitor-Merrimac Memorial Bridge-Tunnel (MMMBT) is the 4.6 mile-long (7.4 km) Hampton Roads crossing for Interstate 664. It is a four-lane bridge-tunnel comprised of bridges, trestles, man-made islands, and tunnels under a portion of the Hampton Roads harbor where the James, Nansemond, and Elizabeth Rivers come together in South Hampton Roads, in the southeastern portion of Virginia in the United States.
It connects the independent cities of Newport News on the Virginia Peninsula and Suffolk in South Hampton Roads and is part of the Hampton Roads Beltway.
It includes a four-lane tunnel that is 4,800 feet (1,463 m) long, two man-made portal islands, and 3.2 miles (5.1 km) of twin trestle.
Above picture is Monitor-Merrimac Memorial Bridge-Tunnel (I-664), looking north. The curving 3.2-mile-long South Trestle is in the foreground. That connects to the South Island, where the south tunnel portal is, for the 4,800-foot long tunnel. The North Island and Newport News are in the distance. Starting at the left edge of the photo is the Newport News Marine Terminal.
Above picture is Monitor-Merrimac Memorial Bridge-Tunnel (I-664), looking south from near the tip of Newport News. In the foreground, you can see the North Approach Bridge, and the Small Boat Harbor to the left. The North Approach Bridge connects to the North Island (actually a peninsula) where the north portal of the tunnel is. In the distance, you can see the South Island and the South Trestle.
Near the mid-point of the I-664 tunnel
Carries: 4 lanes of I-664
Crosses: Hampton Roads
Locale: Suffolk, Virginia to Newport News, Virginia
Maintained by: Virginia Department of Transportation
Design: Composite--Low-level Trestle, Double-tube Tunnel, Manmade islands
Total length: 4.6 miles (7.4 km)
Opening date: April 30, 1992
