Final answer:
When merging with other traffic, you need a gap of four seconds.
Step-by-step explanation:
When merging with other traffic, you need a gap of four seconds.
This means that you should leave a time interval of at least four seconds between your car and the car you are merging with. This ensures a safe distance and allows you enough time to merge effectively without causing any disruptions or accidents.
For example, if you are merging onto a highway, you should wait for a car to pass, then count four seconds before you start merging. This will give you enough time to accelerate, match the speed of the traffic, and merge smoothly.