Which highway runs through both Round Rock, Texas, and Saint Paul, Minnesota?
La Frontera (Round Rock, Texas): La Frontera is Round Rock's largest master-planned, multi-use commercial business-retail-housing center and is located at the northwest corner of SH 45 Toll Road and Interstate 35 in Round Rock, Texas within Williamson County, Texas. Interstate 35:  In two stretches, both through twin cities, the highway splits into Interstate 35E—at Dallas and at Saint Paul, Minnesota—and Interstate 35W—at Fort Worth, Texas, and at Minneapolis.
Interstate 35