Business Loop I-40 at the city of El Reno constitutes an 8.05 mile long route branching north from IH 40/U.S. 270 into the Canadian County seat. The highway overlays Historic U.S. 66 along an expressway leading into the city east from Target Creek. Following Sunset Drive, the business route navigates through the El Reno residential street grid east to Adams Park and U.S. 81 in Downtown.
Turning southward, Business Loop I-40/Historic U.S. 66 combine with U.S. 81 along Choctaw Avenue south, Wade Street east and Rock Island Avenue south. The two routes curve east through an array of industrial businesses onto SE 27th Street at Canadian Square shopping center. Historic U.S. 66 continues east from SE 27th Avenue as SH 66 while Business Loop I-40 returns to I-40/U.S. 270 via U.S. 81 south.

East
Business Loop I-40 commences along an expressway east from a trumpet interchange with IH 40/U.S. 270.
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Historic U.S. 66 parallels Interstate 40 a half mile to the north leading west from El Reno to U.S. 281 Spur.
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The first confirming marker for Business Loop I-40 at El Reno appears where Historic U.S. 66 joins the expressway.
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East
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Business Loop I-40/Historic U.S. 66 (Sunset Drive) narrow from a divided expressway into a four lane boulevard at Reformatory Drive.
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Sunset Drive makes an S-curve southeast through Adams Park.
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Business Loop I-40 (Sunset Drive) crosses Fourmile Creek just ahead of the signalized intersection with Country Club Road south.
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The Union Pacific Railroad spans Sunset Drive between Ellison Avenue and Miles Avenue.
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A Business Loop I-40 reassurance marker stands at the intersection with Miles Avenue.
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U.S. 81 (Choctaw Avenue) travels north from El Reno to Kingfisher.
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The remainder of Business Loop I-40 south from Downtown El Reno overlays U.S. 81.
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Business Loop I-40/U.S. 81 turn east onto Wade Street one block south of Sunset Drive.
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Business Loop I-40/U.S. 81 turn south from Wade Street onto Rock Island Avenue.
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Rock Island Avenue leaves the El Reno residential street grid south of Elm Street.
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Reassurance markers for Business Loop I-40/Historic U.S. 66 east and U.S. 81 south beyond Elm Street.
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The new bridge spanning the Union Pacific Railroad along Rock Island Avenue was completed on October 10, 2021.
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Business Loop I-40/U.S. 81 curve southeast from Rock Island Avenue onto SE 27th Street.
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An end shield precedes the intersection where Business Loop I-40/U.S. 81 turn south to IH 40/U.S. 270.
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U.S. 81 extends south of Business Loop I-40 and El Reno to U.S. 62 at Chickasha.
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The state maintained portion of Historic U.S. 66 commences at Business Loop I-40/U.S. 81 in El Reno. SH 66 runs east to Yukon, Oklahoma City, Bethany and Warr Acres.
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East

South
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U.S. 270 follows Interstate 40 west from El Reno and east across the Oklahoma City area to Shawnee.
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Business Loop I-40 concludes east at the parclo interchange joining U.S. 81 with IH 40/U.S. 270.
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Page Updated Friday July 08, 2022.