When planning road expansion, what aspect is primarily considered to improve traffic flow?

Wider lanes and additional turn signals are crucial elements in enhancing traffic flow during road expansion. Wider lanes allow for more vehicles to travel alongside each other safely, reducing bottlenecks, especially in areas where traffic volumes are high. This increased capacity can significantly decrease congestion and promote smoother transitions through busy sections of road.

Additionally, implementing extra turn signals facilitates better management of vehicles making turns at intersections. This improvement addresses the often problematic scenario of turning vehicles interrupting the flow of through traffic, leading to delays and backups. By optimizing both lane width and signaling at critical junctures, the overall efficiency of the roadway can be significantly enhanced, leading to better traffic conditions.

In contrast, increased numbers of traffic signals can create more stops for drivers, contributing to delays rather than alleviating them. Building parallel roads could be beneficial, but it involves substantial investment and time that may not yield immediate improvements. Reducing speed limits might enhance safety but can also lead to slower traffic flow, negating the intended goal of expanding and improving road efficiency. Therefore, wider lanes and additional turn signals emerge as the most effective strategies for addressing traffic flow in the context of road expansion.