 Wyoming Highway 255 begins its southern end at US 20 Business/US 26 Business (E 1st St./W 1st St.) in Casper and I-25 Business/US 87 Business which will join 255 from the east.Highway 255 travels north for just under a half-mile as "N. Center Street" for to an end at I-25/US 20/US 26/US 87 at Exit 188A.This route is signed as I-25 Business and US 87 Business its whole length from its southern to northern terminus.