Highway 72 uses two inventory control numbers. ML 412 is used for the section from Hanna to US 30 while ML 404 is used for the section from US 30 to Elk Mountain. This results in an unusual situation where mileposts overlap. ML 412 starts at milepost zero at US-30 and continues through Hanna to milepost 3.02, while ML 404 starts at milepost 1.55 from US 30 and continues to milepost 15.98 in Elk Mountain. This means that there are two mileposts for every interval between 1.55 and 3.02.
