Final answer:
Proper action at a 4-way intersection involves slowing down and using signals, not the options given. Traffic signals help manage vehicle flow and require drivers to slow down for safety.
Step-by-step explanation:
When you are approaching a 4-way intersection and see another car preparing to enter from the opposite side, the best course of action to maintain a space cushion and be seen is not specified in the options provided.
However, common safe driving practices include slowing down, being prepared to stop if necessary, and ensuring that your vehicle's headlights and indicators are visible to other drivers.
It's important to follow the rules of the road and use signals appropriately to communicate with other drivers. Moreover, it is essential to keep a safe distance from other vehicles—known as a 'space cushion'—to have ample time to react to any unexpected movements.
The importance of these actions cannot be overstated, as speeding through intersections can lead to accidents. Traffic signals are in place to manage the flow of vehicles and require drivers to slow down, not allowing them to speed through without care.
Moreover, crossing a road safely depends on the distance of oncoming cars and their speed. Evaluating whether it is safe to cross entails considering whether a car is far enough away to allow crossing.