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by qznc 3062 days ago
The rule of thumb in Germany is "half speedometer" which corresponds to 1.8seconds. For example, if you drive at 80km/h, keep a 40m distance. The reflector posts [0] on streets out of towns have a 50m distance, so the distance between two posts at 100km/h.

[0] https://de.wikipedia.org/wiki/Leitpfosten