Which factor is NOT normally considered in a congested roadway's management plan?

In the context of managing congested roadways, the focus is primarily on improving the efficiency of existing infrastructure rather than expanding it, which includes actions that can be implemented relatively quickly and do not require significant new construction.

Lane width optimization is often considered to improve traffic flow by allowing for better vehicle maneuverability, which can enhance safety and reduce congestion. Traffic signal timing adjustments are a critical element of traffic management, as optimizing signal phases can significantly improve traffic flow and reduce delays at intersections. Public transportation enhancements are also a key consideration, as promoting public transit can help reduce the volume of vehicles on the road, thus alleviating congestion.

On the other hand, the construction of new highways is generally not included in a congested roadway management plan because it is a long-term solution that can take years to implement and may not address the immediate need for congestion relief. Additionally, simply adding more road capacity can sometimes lead to induced demand, where new lanes attract more vehicles, ultimately leading to continued congestion rather than resolving the problem. Therefore, while new highway construction can be part of longer-term planning efforts, it does not typically form a part of immediate management strategies for existing congested roadways.