North Temple Street west of 300 West (then US-89/91, now solely US-89) was added to the state highway system in 1931 as part of SR-67. Since it was along the planned alignment for I-80, it became SR-2 (only a legislative designation that was never signed) in 1962, but the portion east of an interchange near the Salt Lake City International Airport was due to be bypassed by the Interstate, and so in 1966 that piece became State Route 267. State Route 176 was built in 1933 with federal aid and numbered in 1935, forming an alternate to US-89/91 through downtown Salt Lake City. Its original route began at South Temple Street and 300 West, and ran south on 300 West and east on 900 South to State Street. The north end was extended one block to North Temple Street in 1962, when US-89A/91A was moved from South to North Temple, and in 1967 the south end was removed from 900 South and sent down 300 West to SR-171 (3300 South). The latter extension was done in exchange for State Route 202, which followed Main Street between SR-201 (2100 South) and SR-171 from 1961 to 1967. Both of these routes - SR-176 and SR-267 - became part of SR-186 in 1969. The parts of SR-186 (400 South) west of SR-176 (300 West) and SR-176 south of SR-186 were dropped from the state highway system, and SR-186 was extended north on 300 West to North Temple and west on North Temple to I-80, replacing the remainder of SR-176 and all of SR-267.