|Jurisdiction||Arkansas State Government|
|Employees||3,693 [Note 1]|
|Annual budget||US$1,212,817,331 [Note 2]|
|Parent agency||Arkansas State Highway Commission|
The Arkansas Department of Transportation (ArDOT), formerly the Arkansas Highway and Transportation Department, is a government department in the U.S. state of Arkansas. Its mission is to provide a safe, efficient, aesthetically pleasing and environmentally sound intermodal transportation system for the user.  The department is responsible for implementing policy made by the Arkansas State Highway Commission, a board of officials appointed by the Governor of Arkansas to direct transportation policy in the state. The department's director is appointed by the commission to hire staff and manage construction and maintenance on Arkansas's highways.
The primary duty of ArDOT is the maintenance and management of the over 16,000-mile (26,000 km) Arkansas Highway System. The department also conducts planning, public transportation, the State Aid County Road Program, the Arkansas Highway Police, and Federal-Aid project administration.  Its headquarters are in Little Rock. 
Central control of highway transportation in Arkansas began with the creation of the State Highway Commission by Act 302 of the 39th Arkansas General Assembly in 1913. The Commission was made up of the Arkansas Commissioner of State Lands and two other governor-appointed members. The Commission was tasked with coordination roadway construction standards and route planning among the state's myriad county agencies and road improvement districts, and had little power or funding.  The situation was bad enough that the federal government, who had become involved in standardizing road construction, stopped sending federal highway dollars to Arkansas in 1923. An emergency session of the 44th Arkansas General Assembly enacted the Harrelson Road Law to meet federal requirements to receive funding. The act also reformed the Highway Commission into four members appointed from the state's agricultural districts by the governor, plus the Commissioner of State Lands (elected statewide) serving as chairman. The Highway Commission had purview over any road projects in the state meeting their standards. Given the ability to control where federal highway dollars were spent, the Highway Commission became very powerful, and subject to political and provincial interests.  This Commission became so powerful, the Commissioner of State Lands was unofficially referred to as the Highway Commissioner almost everywhere except official state documents. 
AHTD and the Nebraska Department of Roads were the only state transportation agencies in the United States whose name still refers to "highways" or "roads"; all are now known as the "(name of state) Department of Transportation" after the U.S. Department of Transportation.[ citation needed] The "Highway" in AHTD's name was largely required by the Arkansas Constitution which created the Arkansas Highway Commission as its governing body; the Constitution still calls it the "State Highway Department", but the legislature added "and Transportation" to its name in 1977.  Many people in Arkansas continue to call it the "Highway Department" to this day.[ citation needed]
On June 8, 2017, the AHTD announced that it would change its name and logo to the Arkansas Department of Transportation (ArDOT) effective July 31, 2017. 
For administrative purposes, ArDOT divided the state of Arkansas into 10 districts  supervised by district offices along with 85 county area maintenance headquarters and 31 resident engineer offices located across the state. Most districts covered multiple counties. As a state agency, its central offices are located in Little Rock, which is covered by District 6. 
The ArDOT currently is divided into 23 divisions. Several of these divisions are administrative: Computer Services, Equipment and Procurement, Fiscal Services, Human Resources, Internal Audit, Legal, Maintenance, and Retirement. Others lead various aspects of highway construction design, construction, financing, planning or coordination. Divisions are further subdivided into Sections.
The Bridge Division contains five Sections: four of bridge design engineers, and the Structural Inventory and Rating Section for existing bridges. Many of Arkansas's highway bridges are designed in-house by these sections, with more complex or specialized bridges traditionally being bid out to a consulting engineering firm for specialized design.
- U.S. Department of Transportation
- State highways in Arkansas
- Arkansas Transit Association
- Arkansas Highways
- Staff (2016). Annual Report (PDF) (Report). Arkansas State Highway and Transportation Department. Archived (PDF) from the original on September 20, 2010. Retrieved August 23, 2010.
- Staff (2007). "Mission Statement". Arkansas State Highway and Transportation Department. Archived from the original on September 18, 2010. Retrieved August 23, 2010.
- Staff (2007). "Contact Us". Arkansas State Highway and Transportation Department. Retrieved September 28, 2011.
- Scoggin, Robert W. (August 3, 2017). "Arkansas Highway Commission". Encyclopedia of Arkansas History and Culture. Butler Center for Arkansas Studies at the Central Arkansas Library System. Retrieved August 20, 2018.
- Staff of the Harrison Daily Times (February 21, 1930). "Man and Woman in State Race". Harrison Daily Times. 11 (131). Harrison: The Times Publishing Company. p. 3. OCLC 18545584 – via NewspaperARCHIVE.
- "Arkansas State Highway and Transportation Department (AHTD) - Encyclopedia of Arkansas". www.encyclopediaofarkansas.net. Retrieved January 17, 2017.
- Chaffin, Sarah (June 7, 2017). "Highway Department Unveils New Logo for Name Change". Little Rock, AR: KATV-TV. Retrieved June 8, 2017.
- Staff (2007). "Districts". Arkansas State Highway and Transportation Department. Archived from the original on September 18, 2010. Retrieved August 23, 2010.
- Staff (2007). "District 6". Arkansas State Highway and Transportation Department. Archived from the original on August 22, 2010. Retrieved August 23, 2010.