Final answer:
You should check traffic signals as far in advance as conditions allow, increasing vigilance at dangerous intersections or when pedestrians are present. Speed should be adjusted to react safely to the traffic signals observed.
Step-by-step explanation:
When it comes to safety on the road, ensuring you check traffic signals in advance is crucial. While there is no one-size-fits-all answer to how far ahead you should check traffic signals, a good rule of thumb is to monitor the traffic situation and signal status as far in advance as possible given the road conditions and the speed you are traveling.
It is important to reduce speed and prepare to stop if the signal indicates it may be necessary. If you approach an intersection where there have been frequent accidents, your vigilance should be increased. Similarly, when there are pedestrians at the intersection, especially students who may be coming to or leaving campus, it is imperative to check for traffic signals well in advance to allow them to cross safely.
In an emergency situation, such as with a pregnant woman about to deliver in your car, the decision to proceed through a red light at 4 AM with no other vehicles in sight assumes the decision will result in greater overall good, despite normally being against traffic laws.