Final answer:
The four-second rule should be used in challenging driving conditions to maintain a safe distance from the vehicle in front. It ensures enough time for a safe stop and is important for driver safety at night, in heavy traffic, and in bad weather.
Step-by-step explanation:
In inclement weather, heavy traffic, or at night, use the four-second rule to ensure there is adequate distance between your fire apparatus and the vehicle in front of you.
The four-second rule refers to the time gap you should maintain when following another vehicle to ensure that you have enough time to stop safely if the vehicle in front of you brakes suddenly.
This rule is especially important in harsh weather conditions, when it's harder to see and stop due to slippery roads, and during the night when visibility is reduced.
It's worth noting that this rule can be adjusted based on the specific driving situation.
For example, in the scenario provided for the question on rule utilitarianism (RU) and the pregnant woman needing to reach the hospital, an argument could be made that disregarding traffic signals could result in a greater overall good due to the urgency of the situation.
However, this is a nuanced ethical discussion, and generally, traffic laws should always be followed for the safety of all road users.