Generally, you should leave about 3 seconds worth of your current speed's distance ahead of you. For example, if you were traveling at 55mph, you would be going at about 81 feet per second. That means you should leave approximately 243 feet between yourself and the vehicle in front of you.
1. Mutate
2. Are selected
3. Evolve
13:30 would be 1:30 pm
15:45 would be 3:45 pm
17:20 would be 5:20 pm
18:00 would be 6:00 pm
is this what you mean?