Final answer:
It is true that one should always be ready for unexpected entries into their lane. Quick reactions controlled by the nervous system are crucial in such scenarios, and awareness of one's surroundings, including the Doppler effect, can aid in safe driving.
Step-by-step explanation:
It is true that you should always be prepared for a person or a vehicle to unexpectedly enter your lane. This scenario demands quick reaction times and situational awareness, which are essential for safe driving. The rapid responses required in such situations are controlled by your nervous system, as detailed in the example of a driver who sees a skateboarder unexpectedly.
Similarly, knowing that the Doppler shift can help you gauge the speed and distance of moving objects like cars can be useful while driving or walking near traffic, as the Doppler effect involves changes in the frequency of sound or light due to the motion of the source or the observer.
Additionally, being unobtrusive can play a role in safer driving conditions since people tend to behave more naturally when they do not feel observed, which can lead to fewer erratic behaviors on the road.