Final answer:
The student's question regarding the year when all vehicles are required to have red and amber lights engage with braking or turn signals cannot be answered accurately with the provided reference information, which discusses an ethical scenario unrelated to vehicle lighting regulations.
Step-by-step explanation:
The question seems to be asking about U.S. federal regulations for vehicle lighting systems, specifically when red and amber lights must engage during braking or the use of turn signals.
However, the provided information discussing the ethical decision of running a red traffic light in the case of a medical emergency for a pregnant woman does not directly answer the question regarding vehicle lighting standards.
The actual year when such regulations were mandated is not provided here, and it falls under highway safety laws which can vary based on country and over time.
Typically, these types of requirements become standardized through organizations like the National Highway Traffic Safety Administration (NHTSA) in the United States, but without a specific year referenced, I cannot provide the accurate year the requirement began.
It is important for drivers to understand and comply with their vehicle's lighting indications for safety. Brake lights and turn signals are crucial for communicating with other drivers on the road, helping to prevent accidents and ensure a smooth flow of traffic, particularly in emergency situations where a driver may need to signal unexpected maneuvers.