It serves as the major truck route between Dallas-Fort Worth and Amarillo, Texas, and between Fort Collins, Colorado, and Laramie, Wyoming.The highway's northern terminus is in Choteau, Montana, 100 miles (160 km) south of the Canadian border, at an intersection with US 89.Its southern terminus (as well as those of US 69 and US 96) is in Port Arthur, Texas at an intersection with State Highway 87 (SH 87), five miles (8 km) up the Sabine River from the Gulf of Mexico.It intersects its parent route US 87 twice, overlapping it from Amarillo to Dumas, Texas, and then crossing it in Denver, Colorado.After crossing the state line north of Kerrick, Texas, the highway intersects SH 171 at its southern terminus.Just past E-470, I-70 and US 36 split to follow a more northerly course, while US 287 and US 40 continue west into Downtown Denver on Colfax Avenue.[citation needed] Continuing north, US 287 passes through Fort Collins on College Avenue, merging with SH 14 at Jefferson Street.On the edge of the mountains at Ted's Place, SH 14 splits and heads west into Poudre Canyon, while US 287 continues north into Wyoming.The section of US 287 between Fort Collins and Laramie, Wyoming, carries very heavy truck traffic and is regarded as quite dangerous.After passing Medicine Bow, these highways turn west-southwest and return to I-80 near Walcott, where they merge with the interstate west until Rawlins.US 287 heads north merging with US 191 and US 89, passing through the John D. Rockefeller Jr. Memorial Parkway before ending at the South Entrance of Yellowstone National Park.Included in the route of US 287 is former US 370, which was commissioned in 1926 and connected Amarillo to Bowie, traveling concurrently with US 70 between Vernon and Wichita Falls, Texas.[7] On April 22, 2021, the Oklahoma House of Representatives passed a Bill that would rename the part of the Highway in the State after the 45th U.S. President Donald Trump.