This occurs to allow space for what was planned to be a diamond interchange.
A diamond interchange is where a freeway and a road meet.
In 1962, the route was extended north a bit to a new diamond interchange with I-70.
The state highway continues south through a diamond interchange with I-264.
Construction on the $4 million diamond interchange was to begin in 1986.
The road turns to the west and comes to a diamond interchange.
It then turns southeast to meet a diamond interchange with I-15.
The two highways meet by way of a diamond interchange.
After leaving town to the north, the route turns back to the west and ends at another diamond interchange with I-15.
Exit 414 is a simple diamond interchange at 78th Street.
