Business Loop I-49 - Butler and Passaic

Established on December 12, 2012, the 6.109 mile route of Business Loop I-49 intertwines with I-49/U.S. 71 northward from Exit 130 to Exit 136. The route connects the freeway with the west side of Butler via Orange Street north from a wye interchange with I-49 as part of Missouri Route 52 to Fort Scott Street. Route 52 branches west to Exit 131 and Amoret while Business Loop I-49 remains northward along a MNA Railroad line to Butler Airport (BUM).

The northernmost 1.25 miles shift west of I-49 to Park Street in the village of Passaic. Highway D concludes the route at I-49/U.S. 71, east of Highway F (Conklin Street).