4 ms·

I would never get closer than a car's length away from the driver in front of me if I was driving 60 mph; why should I act any differently when I'm driving 30 m

I would never get closer than a car's length away from the driver in front of me if I was driving 60 mph; why should I act any differently when I'm driving 30 mph? Speed is trivial - the gap must be maintained so drivers have the opportunity to react to cars around them without having to make any drastic changes in speed.

sukilot 11y ago
Because following distance is irrelevant. Following time matters, and that is a function of speed.
- Inception 11y ago
  Okay, but on-the-fly time calculations aren't exactly optimal. It's much easier to establish a lower limit on distance.