The Battery Park Underpass is a vehicular tunnel at the southernmost tip of Manhattan, New York City, near the neighborhoods of South Ferry and Battery Park City. The tunnel connects FDR Drive, which runs along the east side of Manhattan Island, with the West Side Highway, which runs along the island's west side. Opened in 1951, it was the second section of the FDR Drive to be completed. The underpass crosses beneath the Battery and the approach to the Brooklyn–Battery Tunnel.

Franklin D. Roosevelt East River Drive, commonly called FDR Drive for short, is a controlled-access parkway on the east side of the New York City borough of Manhattan. It starts near South and Broad Streets, just north of the Battery Park Underpass, and runs north along the East River to the 125th Street / Robert F. Kennedy Bridge interchange, where it becomes Harlem River Drive. All of FDR Drive is designated New York State Route 907L (NY 907L), an unsigned reference route.