Which of the following is a duty of VDOT?

The Virginia Department of Transportation, or VDOT, is primarily responsible for the planning, building, and maintaining of the state's transportation infrastructure, which includes interstate highways. This role encompasses a variety of tasks, from construction and repair to management of traffic flow and safety assessments. By maintaining the interstate highways, VDOT ensures that these critical roadways are safe and efficient for public use, which supports both individual travel and the overall economy by facilitating the movement of goods and services.

The other choices listed pertain to functions that are typically managed by different governmental departments. For instance, the issuance of driver's licenses is usually managed by the Department of Motor Vehicles, and administering vehicle insurance is regulated by the state's insurance department. Similarly, while driver education programs may be offered by various organizations, they are not a direct duty of VDOT. Understanding VDOT’s specific responsibilities helps clarify the essential role it plays in maintaining the state's transportation systems.