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State Highway 40 (SH-40) is a
state highway A state highway, state road, or state route (and the equivalent provincial highway, provincial road, or provincial route) is usually a road that is either Route number, numbered or maintained by a sub-national state or province. A road numbered ...
in
Bannock County Bannock County is a county in the southeastern part of Idaho. As of the 2020 census, the population was 87,018, making it the sixth-most populous county in Idaho. The county seat and largest city is Pocatello. The county was established in 189 ...
,
Idaho Idaho ( ) is a landlocked U.S. state, state in the Pacific Northwest and Mountain states, Mountain West subregions of the Western United States. It borders Montana and Wyoming to the east, Nevada and Utah to the south, and Washington (state), ...
, United States, that serves the city of
Downey Downey may refer to: People *Downey (surname) *Robert Downey Jr. Places *Downey, California, US *Downey, Idaho, US *Downey, Iowa, US Businesses * W. & D. Downey, photographic studio * Downey Studios, created out of a former Boeing plant Schools ...
. 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.


Route description

SH-40 begins at a
diamond interchange A diamond interchange is a common type of road junction, used where a controlled-access highway crosses a minor road. Design The freeway itself is grade separation, grade-separated from the minor road, one crossing the other over a bridge. ...
on I-15 (Exit 31) in rural Bannock County, about north of Malad City and about south of
Pocatello Pocatello () is the county seat of and the largest city in Bannock County, with a small portion on the Fort Hall Indian Reservation in neighboring Power County, containing the city's airport. It is the principal city of the Pocatello metro ...
. (The road continues due west from the interchange as East Treasure Lane for about to end at a T intersection with South Marsh Valley Road.) 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 road A dirt road or track is a type of unpaved road not paved with asphalt, concrete, brick, or stone; made from the native material of the land surface through which it passes, known to highway engineers as subgrade material. Terminology Simi ...
s, South Race Track Road (which heads north) and South Olson Road (which heads south). Just beyond the intersection SH-40 passes along the north side of an
Idaho Transportation Department The Idaho Transportation Department (ITD) is the state of Idaho Government agency, governmental organization responsible for state transportation infrastructure. This includes ongoing Maintenance, repair and operations, operations and maintenanc ...
(ITD) maintenance yard. The highway then connects with the north end of Barnes Lane (a short
gravel road A gravel road is a type of unpaved road surfaced with gravel that has been brought to the site from a quarry or stream bed. Gravel roads are common in less-developed nations, and also in the rural areas of developed nations such as Canada and ...
. A little farther on, SH-40 finally enters the
city limits City limits or city boundaries refer to the defined boundary (real estate), boundary or border of a city. The area within the city limit can be called the city proper. Town limit/boundary and village limit/boundary apply to towns and villages. ...
of Downey, just before reaching its eastern terminus at a T Intersection with US-91. (Two sets of
Union Pacific Railroad The Union Pacific Railroad is a Railroad classes, Class I freight-hauling railroad that operates 8,300 locomotives over routes in 23 U.S. states west of Chicago and New Orleans. Union Pacific is the second largest railroad in the United Stat ...
tracks run along the east side of US-91 though Downey.)


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 Annual average daily traffic (AADT) is a measure used primarily in transportation planning, transport engineering, transportation engineering and retail Location_intelligence, location selection. Traditionally, it is the total volume of vehicle tr ...
(AADT), 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 (from the intersection with South Race Track Road/South Olson Road to the US-91), which had an AADT of only 550 vehicles. The posted speed limit for the entire length of the highway is .


Major intersections


See also

*
List of state highways in Idaho The Idaho Transportation Department (ITD) is responsible for the establishment and classification of a state highway network, including of roads that are classified as Interstate Highways, U.S. Highways, and state highways within the state of ...


References


External links

{{commons category-inline, Idaho State Highway 40 040 Transportation in Bannock County, Idaho