How is the number of members on the Georgia State Transportation Board determined?

The number of members on the Georgia State Transportation Board is determined by the number of congressional districts in the state. This structure is established to ensure that each congressional district has representation in the transportation planning and decision-making process. This method ties the board's composition directly to the state's federal representation, which can reflect the diverse transportation needs across various regions.

This is important because it allows for a more localized approach to transportation issues, ensuring that the specific interests and needs of different areas within Georgia are represented effectively. As the representation aligns with the congressional districts, it guarantees that each major region has a voice in transportation policy and funding decisions, which is crucial for effective governance in transportation matters.

Other options do not correctly describe the basis for the membership of the board. The size of the Governor's cabinet, Georgia's population, or the number of state senators does not determine how many members serve on the Transportation Board. Instead, only the congressional districts serve this specific function.