What does tailgating contribute to in traffic scenarios?

Tailgating contributes to chronic traffic congestion because it creates an unpredictable driving environment. When a driver follows another vehicle too closely, they often react too late to sudden stops or slowdowns, which can lead to abrupt braking. This behavior causes a ripple effect in traffic, where vehicles behind must also slow down or brake suddenly, resulting in a chain reaction of braking that can back up traffic significantly.

In addition, tailgating reduces the ability for cars to merge or change lanes safely, leading to potential blockages and bottlenecks. Over time, these bottlenecks contribute to a decline in overall roadway efficiency and can cause delays, effectively increasing the amount of time drivers spend in traffic. This phenomenon is often observed in heavy traffic situations, where tailgating may inadvertently slow down the flow of vehicles, leading to chronic congestion.

The other options suggest improvements in road efficiency, traffic flow, or safety, which are not aligned with the detrimental outcomes associated with tailgating. The act itself does not facilitate better traffic conditions or enhance safety; rather, it creates a hazardous situation that can result in accidents.