Final answer:
You needn't stop for a frozen dessert truck in an emergency situation where proceeding would result in greater overall utility, such as when a pregnant woman in the vehicle is about to give birth and requires immediate medical attention.
Step-by-step explanation:
You needn't stop your vehicle for a frozen dessert truck when it would produce more utility to proceed, and the action is morally permissible given the circumstances. One such scenario is referenced by Rule Utilitarianism (RU), where breaking a traffic law, like stopping at a red light, is justified if it results in a greater good. For instance, if it is 4 AM and there is a pregnant woman in the back seat who is about to deliver, running the red light to reach the hospital quickly can be seen as the morally good action. The RU would argue that the utility of ensuring the safety and health of the pregnant woman and her baby outweighs the utility of obeying the traffic light when no other cars are around. This reasoning could extend to not stopping for a frozen dessert truck under similar pressing circumstances, although specific laws regarding stopping for such vehicles can vary and must be adhered to when not facing an emergency.