 SR-184 remained a separate route until 2007, when North Temple west of State Street was given to Salt Lake City for the Airport extension of the TRAX Green Line.Since North Temple had carried US-89 east of 300 West, that route was realigned to use what had been SR-186 on 300 West and 400 South, cutting SR-186's west end back to 400 South and State Street.But that intersection was also the south end of SR-184, and SR-186 was extended to absorb SR-184.