Idaho State Highway 22
|Maintained by ITD|
|Length||43.936 mi (70.708 km)|
|South end||SH 33 near Howe|
|SH 28 near Blue Dome|
|North end||I-15 in Dubois|
|Counties||Butte, Clark, Jefferson|
SH-22 begins at SH-33 near Arco and travels northeast across the desert before intersecting SH-28 and slowly bending east, passing by some farmland. The highway ends in the city of Dubois at a diamond interchange with I-15.
The current SH-22 bears no resemblance to its original configuration. The route of the original SH-22 was based on Sampson Trails G and H from Mountain Home to Trude, which are essentially the route of today's US-20 from Mountain Home through Arco to Idaho Falls and US-26 east from there.
The current configuration is based on the original SH-29 from the 1937 map.
|Butte||||0.000||0.000||SH 33||Eastern end of SH-33 overlap|
|Clark||||13.588||21.868||SH 28 – Salmon|
||No major junctions|
|Clark||||43.478||69.971||Small Road||Old US-91|
|Dubois||43.936||70.708||I-15 – Idaho Falls, Butte||I-15 exit 167; eastern terminus.|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi|
Route map: Google
- Idaho Transportation Department (January 2, 2016). "State Highway 22 Milepoint Log" (PDF). Idaho Transportation Department. Retrieved February 15, 2017.
- Google (20 July 2012). "State Highway 22" (Map). Google Maps. Google. Retrieved 20 July 2012.
- List of state highways in Idaho#History
- Rand McNally and Company, Road map: Idaho, Mont., Wyo., published by Texaco, 1937
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