Idaho State Highway 40

State Highway 40 is a 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 to an intersection with U.S. Route 91 in Downey.

Route description

SH-40 begins at a diamond interchange on I-15 in rural Bannock County, about north of Malad City and about south of Pocatello. From its western terminus SH-40, known locally as Woodland Road, travels due east towards Downey and immediately passes the just north of the Flags West Truck Stop.
About along its course through agricultural area, SH-40 has an intersection with two dirt roads, South Race Track Road and South Olson Road. Just beyond the intersection SH-40 passes along the north side of an Idaho Transportation Department maintenance yard. The highway then connects with the north end of Barnes Lane

Traffic

Every year, the ITD conducts a series of surveys on its highways in the state to measure traffic volume. This is expressed in terms of average annual daily traffic, which is a measure of traffic volume for any average day of the year. In 2018, ITD calculated that 1,400 vehicles traveled the on highway. The highest traffic section is the first approximately east of I-15, which would include traffic between I-15 and the Flags West Truck Stop. The lowest traffic section was the eastern end, which had an AADT of only 550 vehicles. The posted speed limit for the entire length of the highway is.