Utah State Route 145
American Fork Main Street
|Maintained by UDOT|
|Length:||5.717 mi (9.201 km)|
|Existed:||1978 – present|
|West end:||SR-68 in Saratoga Springs|
|I-15 in American Fork|
|East end:||US-89 in American Fork|
State Route 145 (SR-145), a majority of which is also known as Pioneer Crossing, 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 (the section 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 (including the interchange) and US-89 is designated as Main Street in American Fork's street grid.
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) then becomes American Fork Main Street just prior to where it meets I-15 at a diverging diamond interchange (DDI). The road continues east for about a half-mile and ends at an intersection with State Street (US-89).
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 connector between Redwood Road (SR-68) and I-15 was presented 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 (DDI) Construction began in early 2009, with the road opening to traffic in August 2010. The DDI was the second to be opened in the United States, the first being in Missouri. A subsequent DDI was also created when the American Fork 500 East interchange with I-15 was rebuilt.
The entire route is located in Utah County.
|Location||Mile||Kilometer||Major Roads Intersected||Notes|
|Saratoga Springs||0.000||0.000||SR-68 (Redwood Road)||Western terminus|
|American Fork||5.311||8.547||I-15 – Provo, Salt Lake City||Diverging diamond interchange|
|5.717||9.201||US-89 (State Street)||Eastern terminus|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi
- Utah Department of Transportation, Highway Resolutions: PDF (623 KB), updated November 2008, accessed September 2010.
- Utah Department of Transportation, Highway Referencing: PDF (19 KB), updated August 2010, accessed September 2010.
- "Google Maps". Google.
- Utah Department of Transportation, Pioneer Crossing - Project History, accessed 4 October 2010.
- Utah Department of Transportation, Pioneer Crossing - Diverging Diamond Interchange, accessed 4 October 2010.