The Hugh L. Carey Tunnel, formerly known as the Brooklyn-Battery Tunnel, is a vehicular tunnel in New York City. It connects Manhattan to Brooklyn by running under the East River. Opened in 1950, the tunnel is approximately 9,117 feet long and serves as a vital transportation route for commuters and commercial traffic. Named after former New York Governor Hugh L. Carey, the tunnel plays a crucial role in alleviating congestion on surface streets. It features two tubes, each accommodating two lanes of traffic, and is an essential part of the city's infrastructure, facilitating efficient travel between the boroughs.