Utah State Route 268 grade-level at 400 West and continues east for another block before terminating at US-89 (Beck Street). The State Road Commission designated SR-268 in 1960, connecting proposed I-15 to SR-1 (US-89/US-91) along 600 North. Utah State Route 268 State Route 268 is a state highway in the U.S. state of Utah that connects I-15 to US-89 in a span of . The highway is completely within Salt Lake City and is routed along 600 North. The highway begins just west of the interchange with I-15 at 800 West. Immediately following that intersection, a short viaduct begins. After the structure tops out,
Utah State Route 146 creating Utah State Route 129 on December 5, 2014. Utah State Route 146 State Route 146 (SR-146) was a state highway in the U.S. state of Utah that connected the city of Pleasant Grove with SR-92 at the mouth of American Fork Canyon, some to the north in Utah County. Route 146 started in Pleasant Grove at the intersection of 100 East and State Street US-89. Travelling north on 100 East, the route left Pleasant Grove, turns into Canyon Road, and traveled along the eastern foothills of Cedar Hills, Utah until it ended at the Alpine Loop Scenic Byway at