Utah State Route 145

State Route 145
Pioneer Crossing American Fork Main Street
Route information
Defined by Utah Code §72-4-120
Maintained by UDOT
Length:	5.717 mi[1] (9.201 km)
Existed:	1978[2] – present
Major junctions
West end:	SR‑68 in Saratoga Springs
	I‑15 in American Fork
East end:	US‑89 in American Fork
Highway system
State highways in Utah Interstate • US State (Minor • Parks) Scenic ← SR‑144 SR‑146 →

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.

Route description

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).^[3]

History

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.^[4] The DDI was the second to be opened in the United States, the first being in Missouri.^[5] A subsequent DDI was also created when the American Fork 500 East interchange with I-15 was rebuilt.

Major intersections

The entire route is in Utah County.

Location	mi[1]	km	Destinations	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

References

Route map: Bing