I'm just trying to understand exactly what they are advocating, because so many people seem to be making a dichotomous safety choice. It's not a simple model an

I'm just trying to understand exactly what they are advocating, because so many people seem to be making a dichotomous safety choice. It's not a simple model and my point is there are tradeoffs. >Two car lengths is the general advice. No. It's speed, roadway, and car dependent. Two car lengths isn't even sufficient at 25mph let alone at 70mph.[1] Which all goes to show how poorly people tend to think about these things and quickly resort to overly simplified mental models. [1] https://one.nhtsa.gov/nhtsa/Safety1nNum3ers/august2015/S1N_Aug15_Speeding_1.html https://one.nhtsa.gov/nhtsa/Safety1nNum3ers/august2015/S1N_A...