What should you be cautious of when being passed by another vehicle?

When being passed by another vehicle, it's important to be cautious of extended side mirrors and any objects that might be thrown out. Extended side mirrors can pose a risk as they extend beyond the standard width of the vehicle, and if they are not properly aligned, they can come dangerously close to a motorcycle's space. Additionally, sometimes drivers discard items or allow objects to fly out of their vehicles while passing, which can create hazards for riders.

Being aware of these factors helps maintain your safety on the road, as they can lead to unexpected situations that require quick reflexes. Understanding the potential for objects to enter your path or having another vehicle's mirrors encroach upon your lane can greatly enhance your defensive riding strategies.

In contrast to this, being mindful of engine sounds, traffic signals, and the speed of the passing vehicle, while certainly important, do not address the immediate risks associated with the physical space around you that you're sharing with the passing vehicle. Observing the behavior of vehicles around you and being especially alert to physical encroachments is crucial for maintaining safety.