Who selects the commissioner of transportation according to Article IV, Section 4?

The correct choice is the State Transportation Board because Article IV, Section 4 of the Georgia Constitution specifically designates this board as responsible for selecting the commissioner of transportation. This structure enables a specialized body, with members who have knowledge and expertise in transportation matters, to make the appointment directly, ensuring that the chosen commissioner is well-suited for overseeing Georgia's transportation policies and management. This is a deliberate design to ensure professional oversight within transportation rather than political appointments, as may be seen in other state roles.

The process reflects a commitment to an effective and dedicated transportation system in Georgia, emphasizing governance rooted in expertise rather than broader political influence. Other bodies such as the governor, General Assembly, or Public Service Commission are not vested with this specific authority, as their roles and responsibilities pertain to other aspects of state governance and regulation.