Wikipedia:WikiProject U.S. Roads/Utah/State line crossings

Nevada
Other side: SR 75 (by 1942)
 * Enterprise
 * SR-18, 1941-1945
 * SR-120, 1945-1969

Other side: SR 25 &rarr; SR 319 (by 1932)
 * Modena
 * SR-18, 1927-1935
 * SR-56, 1935-present

Other side: SR 73 &rarr; SR 487 (by 1942)
 * Garrison
 * SR-21, 1927-present

Other side: SR 14 &rarr; US 6 (by 1932)
 * Eskdale
 * SR-27, 1927-1977
 * US-6, 1977-present

Other side: SR 2 (1917)
 * Ibapah
 * Never numbered, but may have been a state highway in the 1910s

Other side: SR 1 &rarr; SR 224 (1917)
 * Wendover
 * SR-4, 1920s-1962
 * SR-2, 1962-1969
 * SR-58, 1969-present

Other side: I-80
 * Wendover
 * SR-2, 1969-1977
 * I-80, 1977-present

Other side: SR 30 &rarr; SR 233 (by 1933)
 * Park Valley
 * SR-70, 1931-1977
 * SR-30, 1977-present

Idaho
Other side: US-30S &rarr; SH-81 (1920s)
 * Clear Creek
 * SR-42, 1927-present

Other side: I-80N &rarr; I-84
 * Snowville
 * SR-3, 1962-1977
 * I-84, 1977-present

Other side: SH-36 &rarr; US-191 &rarr; I-15 (1920s)
 * Plymouth
 * SR-17, 1920s
 * SR-41, 1927-1962
 * SR-1, 1962-1977
 * I-15, 1977-present

Other side: SH-35 (1953; had been an unnumbered state highway)
 * Cornish
 * SR-61, 1931-1953
 * SR-23, 1953-present

Other side: SH-34 (1951)
 * Lewiston
 * SR-200, 1939-present

Other side: US-91 (1920s)
 * Richmond
 * SR-1, 1920s-1962
 * SR-85, 1962-1977
 * US-91, 1977-present

Other side: SH-35 &rarr; US-89 (1920s)
 * Garden City
 * SR-3, 1920s-1962
 * SR-16, 1962-1977
 * US-89, 1977-present

Wyoming
Other side: WYO 65 &rarr; WYO 89 (1920s)
 * Laketown
 * SR-3, 1927-1931
 * SR-51, 1931-1977
 * SR-30, 1977-present

Other side: WYO 65 &rarr; WYO 89 (1920s)
 * Woodruff
 * SR-3, 1920s-1962
 * SR-16, 1962-present

Other side: WYO 10 &rarr; US 30S &rarr; I-80 (1920s)
 * Echo
 * SR-4, 1920s-1962
 * SR-2, 1962-1977
 * I-80, 1977-present

Other side: N/A
 * Coalville
 * SR-133, 1941-1969

Other side: WYO 150 (1920s)
 * Mirror Lake
 * SR-150, 1953-present

Other side: N/A
 * Birch Creek
 * SR-135, 1935-1969

Other side: WYO 414
 * Antelope
 * SR-43, 1927-present

Other side: WYO 530
 * Manila
 * SR-43, 1927-present

Other side: WYO 373 &rarr; US 191
 * Dutch John
 * SR-260, 1957-1981
 * US-191, 1981-present

Colorado
Other side: SH 318 (1970s)
 * Dutch John
 * Never a state highway

Other side: SH 2 &rarr; US 40 (1920s)
 * Jensen
 * SR-6, 1920s-1977
 * US-40, 1977-present

Other side: SH 64 (1920s)
 * Jensen
 * SR-45, 1927-1943

Other side: N/A
 * Bonanza
 * SR-45, 1945-1968

Other side: SH 4 &rarr; US 50 &rarr; I-70 (1920s)
 * Cisco
 * SR-8, 1920s-1962
 * SR-4, 1962-1977
 * I-70, 1977-present

Other side: SH 90 (1920s)
 * La Sal
 * SR-46, 1927-present

Other side: SH 10 &rarr; US 160 &rarr; US 666 &rarr; US 491 (1920s)
 * Monticello
 * SR-9, 1920s-1977
 * US-666, 1977-2003
 * US-491, 2003-present

Other side: SH 32 (early 1960s)
 * Aneth
 * Never a state highway

Other side: SH 41 (1960s)
 * Aneth
 * SR-262, 1965-2004
 * SR-162, 2004-present

Arizona
Other side: US 191 (by 1983)
 * Bluff
 * US-191, 1983-present

Other side: SR 464 &rarr; US 163 (by 1963)
 * Monument Valley
 * SR-47, 1931-1977
 * US-163, 1977-present

Other side: US 89 (by 1961)
 * Big Water
 * SR-259, 1957-1977
 * US-89, 1977-present

Other side: US 89 &rarr; US 89A (1927)
 * Kanab
 * SR-1, 1920s-2008
 * US-89A, 2008-present

Other side: SR 389 (by 1961)
 * Rockville
 * SR-16, 1920s-1935
 * SR-59, 1941-present

Other side: N/A
 * St. George
 * SR-64, 1931-1969

Other side: US 91 &rarr; I-15 (1927)
 * St. George
 * SR-1, 1920s-1962
 * SR-1, 1962-1977
 * I-15, 1977-present