1. 6-8 seconds
On the expressway, maintain a 3-4 second following distance. If the road is slippery or wet, adjust your distance to 6-8 seconds.
While driving on the expressway, always try to maintain a 3-4 second distance.
Whenever the road is slippery or wet, you should reduce you speed and adjust your distance to 6-8 seconds.
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.