Business Loop I-45 - Ennis

The business route for IH 45 at Ennis loops 4.51 miles west between Exits 249 and 253. Old U.S. 75 emerges from the freeway at a split diamond interchange along Kaufman Street. Kaufman Street follows old U.S. 75 north to Old Dallas Highway, which splits with Business Loop I-45 along the industrial north side of Ennis.

Business Loop I-45G replaced SL 563 along the northern half of the route when it was designated on June 21, 1990. The southern half between IH 45 and Ennis Avenue in Downtown was also a part of U.S. 287 until the route was realigned onto a bypass west of the city in 1994. The old route was designated as Business U.S. Highway 287S on December 21 of that year.