The
Brooklyn–Battery Tunnel, officially known as the
Hugh L. Carey Tunnel, is a
toll road in
New York City which crosses under the
East River at its mouth, connecting the Borough of
Brooklyn on
Long Island with the Borough of
Manhattan. The tunnel nearly passes underneath
Governors Island, but does not provide vehicular access to the island. It consists of twin tubes, carrying four traffic lanes, and at 9,117 feet (2,779 m) is the longest continuous underwater vehicular
tunnel in
North America. It was opened to traffic in 1950. It currently carries the
unsigned Interstate 478 (
I-478) designation, and formerly carried New York State Route 27A (NY 27A). The tunnel was officially named after former
New York Governor
Hugh Carey in December 2010.