Final answer:
Counting "ONE- TWO THREE" after the vehicle ahead has started to move or when the light changes to green helps maintain safety and ensure smooth traffic flow.
Step-by-step explanation:
In the context of the question, counting "ONE- TWO THREE" implies counting seconds after the vehicle ahead has started to move or when the traffic light changes to green. This is often done to ensure a safe following distance between vehicles or to synchronize driving actions with the traffic flow.
For example, if the vehicle ahead starts moving, you would start counting "ONE- TWO THREE" to determine an appropriate gap before starting your vehicle. Similarly, when the traffic light changes to green, you would count "ONE- TWO THREE" to delay your movement for a few seconds, allowing any last-minute vehicles to clear the intersection.
Counting "ONE- TWO THREE" after the vehicle ahead has started to move or when the light changes to green helps maintain safety and ensure smooth traffic flow.