US-20 between Lusk, WY and Sioux City, IA: 446 miles
(alternate route: via I-90: 573 miles)
US-400/US-54 between Wichita KS and Tucumcari NM: 418 miles
(alternate route: via OKC: 528 miles)
US-63/IA-163/US-61 between Des Moines, IA and St Louis MO: 349 miles
(alternate route: via Coralville to...