three or four seconds The Two Second Rule http://en.wikipedia.org/wiki/Two-second_rule http://en.wikipedia.org/wiki/Two-second_rule three or four seconds three or four seconds two-second rule three or four seconds maintain a safe distance the two second rule is a good guide estimate Two-Second Rule http://en.wikipedia.org/wiki/Two-second_rule http://en.wikipedia.org/wiki/Two-second_rule maintain a safe distance three or four seconds three or four seconds follow 2 seconds behind two seconds driving distance Two-second rule two-second rule It is called the two second rule. 2-second rule two-second rule http://en.wikipedia.org/wiki/Two-second_rule three or four seconds http://en.wikipedia.org/wiki/Two-second_rule two-second rule two-second rule http://en.wikipedia.org/wiki/Two-second_rule view article two-second rule http://en.wikipedia.org/wiki/Two-second_rule keeping your distance 2 second rule two-second rule 2 second rule three or four seconds Two-second rule