sentences:  The segment of US 59 inside Loop I-610, through downtown Houston, was approved for designation as I-69 by the FHWA on March 9, 2015 and approved for signage as I-69 by the Texas Transportation Commission on March 25, 2015.I-69 will follow US 59 to the north, serving Cleveland, Shepherd, Livingston, Lufkin, Nacogdoches, and Tenaha.In Tenaha, I-69 will head into Louisiana along the US 84 corridor.