How can drivers best avoid collisions with motorcycles?

Answer: B — Always signal lane changes

Always signaling lane changes is crucial for drivers to avoid collisions with motorcycles. Motorcycles are smaller and can easily be overlooked, making communication of intentions on the road even more important. By signaling lane changes, a driver clearly indicates their intent to other road users, including motorcyclists, allowing them to anticipate movements and react accordingly. When drivers signal, it creates an opportunity for motorcyclists to adjust their position or speed if necessary, thereby reducing the likelihood of unexpected encounters or accidents. This proactive communication is particularly vital given the smaller size and different maneuverability of motorcycles compared to larger vehicles. The other options do not promote safety on the road. Underestimating a motorcycle's speed can lead to dangerous misjudgments. Ignoring the presence of motorcycles can lead to serious accidents since they may blend into traffic. Speeding up when approached can create a hazardous situation by reducing reaction time and increasing the potential for a collision.