According to my defensive driving course, minimum 4 second follow distance and 1 additional second for additional factors such as towing, tiredness, night/rainy

According to my defensive driving course, minimum 4 second follow distance and 1 additional second for additional factors such as towing, tiredness, night/rainy conditions, and several others. I think it was NSC who did the certification. https://www.nsc.org/safety-training/defensive-driving https://www.nsc.org/safety-training/defensive-driving