When referring specifically to the lower Manhattan business district such as Wall Street and its immediate environs, the northern border is commonly designated by thoroughfares approximately a mile-and-a-half (3 km) south of 14th Street and a mile (2 km) north of the island's southern tip: Chambers Street from near the Hudson east to the Brooklyn Bridge entrances and overpass. Two other major arteries are also sometimes identified as lower Manhattan's northern border: Canal Street, half a mile north of Chambers Street, and 23rd Street, half a mile north of 14th Street.