Business Loop I-40 - Williams

I-40 east at Business Loop I-40 - Williams, AZ
Interstate 40 east at Exit 161 for the Williams business route. This loop is not inventoried in the Arizona Department of Transportation (ADOT) Route Log. 04/27/17
I-40 west at Business Loop I-40/SR 64 - Williams, AZ
Business Loop I-40 west to Williams begins from Interstate 40 opposite SR 64 north to the Grand Canyon. 04/27/17

Interstate 40 bypassed the final segment of Historic U.S. 66 when it opened on October 13, 1984 at Williams. The designation was retired the following year on June 27 (FHWA, 2010), with the former alignment between Exits 161 and 165 renumbered as Business Loop I-40. This loop is locally maintained.

Business Loop I-40 Photo Guide

References

Federal Highway Administration (FHWA). (2010, March 12). Eisenhower Interstate Highway System, Previous Facts of the Day. Retrieved from https://www.fhwa.dot.gov/interstate/previousfacts.cfm
Updated August 1, 2026