Two-second rule

（重定向自Two second rule）

The two-second rule (also known as the three-second rule in some states) is a rule of thumb by which a driver may maintain a safe following distance at any speed. The rule is that a driver should ideally stay at least two seconds behind any vehicle that is directly in front of the driver's vehicle. It is intended for automobiles, although its general principle applies to other types of vehicles.

单词	Two second rule
释义	Two second rule 英语百科 Two-second rule （重定向自Two second rule） The two-second rule (also known as the three-second rule in some states) is a rule of thumb by which a driver may maintain a safe following distance at any speed. The rule is that a driver should ideally stay at least two seconds behind any vehicle that is directly in front of the driver's vehicle. It is intended for automobiles, although its general principle applies to other types of vehicles.
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