I-70 through I-74 and Signed Branch Routes

Interstate South/West Terminus North/East Terminus
70 Cove Fort, UT Baltimore, MD
170 MO Brentwood Hazelwood
270 CO Welby Northfield, Denver
270 IL/MO Mehlville, MO Troy, IL
270 MD Bethesda Frederick
270 OH Beltway – Columbus
370 MD Gaithersburg Washington Grove
470 KS western Topeka eastern Topeka
470 MO Kansas City Independence
470 OH/WV Blaine, OH Wheeling, WV
670 KS/MO Kansas City, KS Kansas City, MO
670 OH Columbus Gahanna
71 Louisville, KY Cleveland, OH
271 OH Weymouth Willoughby Hills
471 KY/OH Highland Heights, KY Cincinnati, OH
72 Hannibal, MO Champaign, IL
172 IL Fall Creek near Quincy
73 near Candor, NC Greensboro, NC
74 Davenport, IA Cincinnati, OH
74 NC near Pine Ridge Lumberton
474 IL Peoria East Peoria
I-70 west Green River, UT
Heading west from Green River, Utah along Interstate 70, motorists are alerted to the lack of services to Salina. 08/17/13

The 106-mile long stretch between Green River and Salina, Utah on I-70 is the longest on the Interstate system without any services. The longest stretch of a numbered route in the lower 48 states is the 163 mile drive along U.S. 6 between Tonopah and Ely, Nevada.

I-70/71 west split - Columbus, OH
I-70 and I-71 conclude a 1.74 mile long overlap through Downtown Columbus at Ohio State Route 315 (Olentangy Freeway) north. 10/01/10

The numbering grid of the Interstate system includes an array of overlaps where consecutively numbered routes either intersect or overlap. The junction of I-70 and 71 is one such in Ohio. Two others are the east end of I-74 at I-75 in Cincinnati and the overlap of I-76/77 at Arkon.