Drivers should allow at least a second following distance for motorcycles.

4 seconds.

Explanation:

The precautions to be followed when driving behind a motorcycle are slightly greater than when behind a car.

Motorcycle drivers will usually slow down just changing shifts down, or decelerate the bike rather than using the breaks, thus, the driver behind him won't see any red lights turned on, and it might be harder to interpret what the rider is doing.

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