Final answer:
Drivers are required by law to slow down and change lanes when approaching an emergency vehicle stopped on the roadside to ensure safety. The specifics of this requirement can vary by jurisdiction and there may be exceptions in emergency situations. The overarching goal is to respect the legitimate authority of first responders while maintaining road safety.
Step-by-step explanation:
The question pertains to a traffic law that requires drivers to slow down and change lanes when approaching a roadside incident, such as an emergency vehicle stopped on the side of the road. This law is in place to ensure the safety of first responders and those involved in the roadside incident.
It typically mandates that drivers either move over to a non-adjacent lane or significantly reduce their speed if unable to change lanes safely. It's also important to note that the specifics of this law can vary from one jurisdiction to another.
For example, if a driver hears the Doppler shift in an ambulance siren indicating it is getting closer, they should pull over to allow it to pass. This anticipates the situation where a traffic signal might compel a vehicle to stop, even in emergencies; however, the practical implementation of the law might allow exceptions in urgent cases.
It is also unlawful for a police officer to use their authority for personal gains, such as commanding a driver to perform tasks unrelated to traffic management.