What is the most efficient way to be aware of what is happening behind you while riding?

Using side mirrors frequently is the most efficient way to be aware of what is happening behind you while riding. This method allows riders to maintain a forward focus while still being aware of their surroundings. Side mirrors are strategically positioned to give a comprehensive view of the traffic to the sides and behind, supporting proactive decision-making.

Constantly looking over your shoulder can lead to a lack of attention to the road ahead and may destabilize your riding position. Relying solely on the rearview mirror is inadequate since it only provides a limited view and can miss critical side traffic. Listening for sounds from behind might not provide clear or timely information about the position or actions of nearby vehicles, which can lead to a false sense of security. Therefore, frequently checking the side mirrors strikes a good balance between maintaining awareness and focusing on riding safely.