Wikipedia:WikiProject U.S. Roads/Utah/SLC streets

East-west

3300 South

• West of State: SR-4, 1920s to 1962; SR-171, 1962 to present
• East of State: SR-171, 1935 to present

2100 South

• West of State: SR-201, 1939 to present
• East of State: SR-4, 1920s to 1962; SR-201, 1962 to 1969

900 South

• 300 West to State: SR-176, 1935 to 1967

600 South/500 South

• I-15 to 300 West: SR-269, 1960 to present
• 300 West to 200 West: SR-269, 1963 to present
• 300 West to State: SR-269, 1969 to present

400 South (and 500 South east of 1000 East)

• I-215 to Redwood: SR-186, 1966 to 1967
• Redwood to 300 West: SR-186, 1941 to 1969
• 300 West to State: SR-186, 1941 to 2007; US-89, 2007 to present
• State to university: SR-186, 1935 to present
• East of university: SR-186, 1941 to present

South Temple

• 300 West to State: SR-1, 1920s to ca. 1961 (still there in 1960, but moved by 1962 - see SR-176 description)
• State to 1300 East: SR-181, 1935 to 1969

North Temple

• West of 300 West: SR-67, 1931 to 1962; SR-2, 1962 to 1966; SR-267, 1966 to 1969; SR-186, 1969 to 2007
• 300 West to State: SR-1, ca. 1961 to 1964; SR-271, 1964 to 1977; US-89, 1977 to 2007

600 North

• I-15 to 300 West: SR-268, 1960 to present

North-south

300 West

• 3300 South to 900 South: SR-176, 1967 to 1969
• 900 South to 400 South: SR-176, 1935 to 1969
• 400 South to South Temple: SR-176, 1935 to 1969; SR-186, 1969 to 2007; US-89, 2007 to present
• South Temple to North Temple: SR-1, 1920s to ca. 1961; SR-176, ca. 1961 to 1969; SR-186, 1969 to 2007; US-89, 2007 to present
• North of North Temple: SR-1, 1920s to 1964; SR-271, 1964 to 1977; US-89, 1977 to present

West Temple

• I-15 to 900 South: SR-270, 1960 to present
• 900 South to 400 South: SR-270, 1969 to present

Main

• 3300 South to 2100 South: SR-202, 1961 to 1967

State

• South of 400 South: SR-1, 1920s to 1964; SR-271, 1964 to 1977; US-89, 1977 to present
• 400 South to South Temple: SR-1, 1920s to 1964; SR-271, 1964 to 1977; US-89, 1977 to 2007; SR-186, 2007 to present
• South Temple to North Temple: SR-181, 1935 to ca. 1961; SR-1, ca. 1961 to 1964; SR-271, 1964 to 1977; US-89, 1977 to 2007; SR-186, 2007 to present
• North Temple to capitol: SR-181, 1935 to 1963; SR-184, 1963 to 2007; SR-186, 2007 to present

700 East

• South of 400 South: SR-71, 1957? (might have been 1953) to present
• 400 South to South Temple: SR-71, 1957? (might have been 1953) to 1969

900 East

• South of 2100 South: SR-71, 1931 to 1957? (might have been 1953)

1300 East

• South of 3300 South: SR-181, 1969 to 2007
• 3300 South to Highland: SR-181, 1959 to 2007
• Highland to 2100 South: SR-181, 1957 to 2007
• 2100 South to 500 South: SR-186, 1935 to 1941; SR-181, 1941 to 2007
• 500 South to 200 South: SR-186, 1935 to 1941; SR-181, 1941 to 1969
• 200 South to South Temple: SR-181, 1935 to 1969

Highland

• South of 1300 East: SR-152, 1933 to 1968
• 1300 East to 2700 South: SR-152, 1933 to 1957

2300 East

• South of 3900 South: SR-195, 1968 to 2006
• 3900 South to I-80: SR-195, 1968 to 2007
• I-80 to 2100 South: SR-195, 1961 to 1984
• 2100 South to Foothill: SR-195, 1947 to 1981

U.S. Routes

The maps may be out-of-date.

US-40

• early: moved from 3300 South to Saltair Highway (SR-67) west of SLC [1]
• 1937: North Temple, ..., State, 2100 South
• 1959 (SR-181 history), 1967 (SR-176 history): North Temple, 300 West, 900 South, State, 2100 South
• 1963, 1965 Rand McNally: North Temple, ..., State, 2100 South
• 1967 (SR-186 history), 1968 (SR-195 history): North Temple, 300 West, 400 South to Parley's Canyon
• TerraServer-USA max zoom: ...400 South to Parley's Canyon (purple, so it had been elsewhere)
• 1975 (US-40 history): AASHTO approved truncation (appears to have been completely on I-80)

US-40A

• 1959, 1963, 1965 Rand McNally, 1967 (assumed): 400 South to Parleys Canyon
• 1968: State, 2100 South
• TerraServer-USA max zoom: 300 West, 900 South, State?, 2100 South (latter is purple, so it had been elsewhere)

2100 South east of State deleted in 1969

• 1975 (US-40 history): AASHTO approved deletion (was once again on 400 South)

US-50/US-50A

• 1937: 3300 South, State
• 1959, 1963, 1965 Rand McNally, 1967: 2100 South, State
• 1971 (US-91 history): AASHTO approved something
• 1976 (US-50 history): AASHTO approved deletion of US-50A (was it on I-15 or State?)

US-89/US-91

• 1959, 1967: State, 900 South, 300 West

900 South deleted in 1967

• 1976 AAA Triptik: State, 400 South, 300 West

US-91A

• 1959: State, South Temple
• 1967: State, North Temple