South Dakota State Highways

The South Dakota state highway system not including interstates or US numbered highways is a network of 4,572 miles of roads that are maintained by the South Dakota Department of Transportation. The system includes a variety of roads, from major highways to rural roads. The system is designed to provide a safe and efficient way for people to travel throughout the state.

The South Dakota state highway system not including interstates or US numbered highways is a network of 4,572 miles of roads that are maintained by the South Dakota Department of Transportation. The system includes a variety of roads, from major highways to rural roads. The system is designed to provide a safe and efficient way for people to travel throughout the state.

The system is divided into three main categories:

  • Primary highways: These are the major highways in the state. They are numbered with two-digit numbers.
  • Secondary highways: These are the minor highways in the state. They are numbered with three-digit numbers.
  • Farm-to-Market roads: These are the rural roads in the state. They are numbered with four-digit numbers.

The system is also divided into two main types of roads:

  • Paved roads: These roads are made of asphalt or concrete.
  • Unpaved roads: These roads are made of gravel or dirt.

The state highway system is an important part of the transportation infrastructure in South Dakota. It provides a way for people to travel throughout the state, and it also helps to support economic development.