Idaho State Highway 40
SH-40 highlighted in red | ||||
| Route information | ||||
| Maintained by ITD | ||||
| Length | 2.737 mi (4.405 km) | |||
| Major junctions | ||||
| West end | I-15 west of Downey | |||
| East end | US 91 in Downey | |||
| Location | ||||
| Country | United States | |||
| State | Idaho | |||
| Counties | Bannock | |||
| Highway system | ||||
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State Highway 40 (SH-40) is a 2.737-mile-long (4.405 km) state highway in Bannock County, Idaho, United States, that serves the city of Downey. The highway travels due east from an interchange with Interstate 15 (I-15) to an intersection with U.S. Route 91 (US-91) in Downey.