Interstate 10 (I-10) in the US state of New Mexico is long main route of the Interstate Highway System. I-10 traverses Southern New Mexico through Hidalgo, Grant, Luna, and Doña Ana counties. The Interstate travels west–east between the Arizona state line and the interchange with I-25 in Las Cruces, and then travels north–south into Texas. U.S. Route 80 (US 80) was replaced by I-10 through New Mexico, and was removed in two stages, with all the signage removed by October 1991.