page_title: Ports to Plains Corridor
section_title: Route description
hierarchical_section_title: Ports to Plains Corridor / Route description
caption_attribution_description: English: IH 35 and Loop 20 Intersection in Laredo, Texas
context_page_description: The Ports-To-Plains Corridor, also known as National Highway System High Priority Corridor 38, is a highway corridor between the United States Mexico border at Laredo, Texas and Denver, Colorado. It is the southern third of the Ports-to-Plains Alliance. The reason for proposed improvements to this corridor is to expedite the transportation of goods and services from Mexico in the United States and vice versa. The Ports-To-Plains Corridor starts in South Texas and traverses through Texas, New Mexico, Oklahoma, and ends in Denver, Colorado.
  The Intermodal Surface Transportation Efficiency Act of 1991 made the Ports-to-Plains Corridor National Highway System High Priority Corridor 38 in 1998. The High Priority designation, which applies to 90 routes or groups of routes nationally, does not create any additional design requirements and does not have a separate federal funding source.
context_section_description: The Ports-to-Plains Corridor starts at the Mexico–United States border at a bridge crossing in Laredo, Texas, where it meets and runs concurrent with I-35, a six-lane freeway. North of Laredo, the route follows US 83, a two-lane highway to Carrizo Springs, Texas, where the route follows US 277 through Eagle Pass, Del Rio, Sonora, and San Angelo, Texas. North of San Angelo, the route follows US 87, a four-lane highway, through Big Spring and Lamesa and finally to Lubbock. Additionally, the corridor connects to Midland using State Highway Route 158 between Sterling City and Midland and State Highway Route 349 between Midland and Lamesa.
  North of Lubbock, the route follows I-27 to Amarillo. North of Amarillo, the route is again marked as US 87 and returns to four-lane highway. At Dumas, a spur of the route extends northwest to Raton, New Mexico on mostly four-lane US 87.
  The route continues north from Dumas using US 287. At the Oklahoma/Texas border, the route continues along US 287. It passes through Boise City, Oklahoma in the western panhandle.
  Continuing north, the route follows US 287 through Springfield, Lamar, and Kit Carson, Colorado. North of Kit Carson, the route follows US 40 to Limon, Colorado, where it joins I-70 for the final leg into Denver, Colorado, where the highway ends at an interchange with I-25/US 6/US 85/US 87.
  The cities of Laredo, Eagle Pass, and Del Rio are each located on the U.S./Mexico Border and are gateways to trade between the two countries.
caption: The stack interchange between I-35 and Loop 20 in Laredo, Texas.
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