Street 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 now aligned along the entirety of 2100 South from US-40/future I-215 at the mouth of Parley's Canyon west to State Street and beyond with US-50A to US-40 west of Magna. Both mainline and Alternate US-40, along with US-50A, were truncated to east of the city by 1979. Constructing a freeway By 1958, SR-201 between US-40 west of Magna and SR-68 (Redwood Road) was a two-lane highway through rural Salt Lake County. The rural landscape changed by the time SR-201 intersected 300 West and entered urban Salt Lake County, the highway becoming a four-lane road. The route remained this way until the intersection of 1300 East (SR-181), where the route reverted to a two-lane configuration. By 1965, a time when most U.S. Routes in the city were being replaced by Interstate Highways, all two-lane portions of the road east of 1300 East were widened to at least four lanes; an interchange between US-40, US-40A and future I-215 was being built at the mouth of Parley's Canyon. From under-construction I-15 west to Redwood Road, the old route of SR-201 was being superseded by a six-lane freeway directly to the south. All construction was complete by 1970 with interchanges at 900 West and Redwood Road; the new freeway extended west to 2700 West. By 1977, an interchange directly west of Redwood Road at I-215 was being built and the rest of the highway to Magna was given a median in preparation for freeway construction to 5600 West (SR-172). This construction concluded by 1986, with interchanges at 3200 West, Bangerter Highway (SR-154, then solely 4000 West) and 5600 West as a result. Beginning in April 1997 and concluding in July 2001, as part of a larger reconstruction project for I-15, SR-201 was rebuilt from 900 West to I-15/I-80, including the colloquial "Spaghetti Bowl"