Hacker News Reader

That's just not true. The two cars behind that one were well more than two car lengths apart. Following too close is a non-sequitur.

Unless they are going under 13mph, two car lengths is too close.

I have always heard you should keep two seconds between cars. So at 20mph, you are 60 feet apart. At 60mph you are 180 feet apart.

In any case they stopped successfully, it was the ones behind them that pushed them forward.