| State Route 145 | ||||
|---|---|---|---|---|
| Pioneer Crossing Main Street |
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| Route information | ||||
| Defined by Utah Code §72-4-120 | ||||
| Maintained by UDOT | ||||
| Length: | 5.717 mi[2] (9.201 km) | |||
| Existed: | 1978[1] – present | |||
| Major junctions | ||||
| West end: | SR-68 in Saratoga Springs | |||
| I-15 in American Fork | ||||
| East end: | US-89 in American Fork | |||
| Highway system | ||||
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State highways in Utah
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State Route 145 (SR-145) is a west–east thoroughfare completely within Utah County in northern Utah that cuts through Saratoga Springs, Lehi, American Fork, and portions of unincorporated Utah County. While the portion between Interstate 15 (I-15) and U.S. Route 89 (US-89) has been under state jurisdiction since 1978, the remaining roadway between SR-68 and I-15—named Pioneer Crossing—opened in 2010, forming an alternative routing to SR-73, which also connects SR-68 and I-15 further north. The original portion of the route between I-15 and US-89 is designated as Main Street in American Fork's street grid.
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Commencing from the route's western terminus in northern Saratoga Springs, SR-145 heads east as Pioneer Crossing with two lanes in each direction, divided by a center turn lane. After crossing over the Jordan River, the route takes a brief northeasterly turn before returning due east. The route passes through a rural area of western Utah County before entering a stretch of development past 2300 West. The highway turns southeast to avoid development before again turning northeast and east. The road gains a third lane in each direction past 300 East (on Lehi's grid) and meets I-15 at a diverging diamond interchange. The road continues east for about a half-mile, this time as American Fork's Main Street, and ends at an intersection with State Street (US-89).[3]
State maintenance of Main Street in American Fork (from I-15 to US-89) was established in May 1978, the state legislature approving that the following year. By 2003, a concept of a Redwood Road–I-15 connector was made present in an environmental impact study for the Mountain View Corridor. After a separate study was completed in 2008, plans to construct the connector were set in place. As part of a project to reconstruct over twenty miles of I-15 through Utah County, the present interchange at Main Street was set to be rebuilt as a diverging diamond interchange. Construction began in early 2009, with the road opening to traffic in August 2010.[4] The diverging diamond interchange was the second to be opened in the United States, the first being in Missouri.[5]
The entire route is located in Utah County.
| Location | Mile[2] | Roads intersected | Notes | |
|---|---|---|---|---|
| Saratoga Springs | 0.000 | SR-68 (Redwood Road) | Western terminus | |
| American Fork | 5.311 | I-15 – Provo, Salt Lake City | Diverging diamond interchange | |
| 5.717 | US-89 (State Street) | Eastern terminus | ||
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi | ||||