Utah State Route 201 to connect to North Temple). In 1939, the state legislature designated State Route 201, running west on 2100 South from State Street (US-40/US-91) to US-50 (9180 West) in Magna. By 1954, US-50 was moved south to an alignment through central Utah, the old routing mostly replaced by US-50 Alternate (US-50A). However, US-50A was placed in Salt Lake City on 2100 South west of State Street, replacing the SR-201 designation. By 1965, US-40 was realigned along Foothill Drive (then US-40A), the Utah Highway Department believing the Foothill route was more direct in connecting with North Temple toward the airport. US-40A was
Utah State Route 123 Utah State Route 123 Utah State Route 123 (SR-123) is a state highway in the U.S. state of Utah. Spanning , it connects the city of East Carbon with US-6 / US-191 in Carbon County. State Route 123 begins at Sunnyside Junction on US-6/US-191, about southeast of Price. It heads east, passing through East Carbon-Sunnyside at the base of the Book Cliffs. It turns to the northeast and terminates shortly after it enters Whitmore Canyon. The road from Sunnyside Junction through Sunnyside to Columbia (now all part of East Carbon-Sunnyside) was added to the state highway system in 1931, initially