Why is it important to signal lane changes?

It is crucial to signal lane changes primarily to inform other drivers of your intentions. When a driver indicates a lane change by using their turn signals, it communicates to those around them that they plan to move into another lane. This action promotes safety on the roadway, as it allows other drivers to anticipate and adjust their own movements accordingly, reducing the risk of collisions. Proper signaling helps to maintain the flow of traffic and fosters an environment of mutual respect among drivers.

The other options do not adequately address the significant safety aspect of signaling. Showing off a vehicle does not enhance safety; complying with police requirements can have other purposes, and fuel efficiency is not related to signaling but rather pertains to driving habits and vehicle maintenance. The act of signaling is fundamentally about maintaining awareness and communication in a shared driving environment.