State Highway 310 (SH 310) is an 8.3-mile (13.4 km) north–south state highway located mostly within Dallas. It is a portion of the old route of U.S. Highway 75 (US 75) along the Central Expressway, which now ends in downtown Dallas. The road, located within Hutchins and South Dallas, has been replaced as the major through route by Interstate 45 (I-45). SH 310 is known as the South Central Expressway south of its intersection with Loop 12 and the S. M. Wright Freeway north of it. From Wikipedia
