On the expressway, maintain a 3-4 second following distance. if the road is slippery or wet, adjust your distance to

6-8 seconds

Explanation:

According to my research on different traffic safety rules and regulations, I can say that based on the information provided within the question in this situation you should adjust your distance to 6-8 seconds. This is a safety measure that is put in place so that less accidents occur. When the road is wet, it reduces the grip that the wheels have on the pavement which may cause your tires to skid when braking, causing your car to not slow down or halt when you press the brakes. Which in term can cause an accident.

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