Illinois CDL Practice Exam

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What does the "two-second rule" in driving help with?

Maintaining a safe following distance

The "two-second rule" is a guideline used to ensure that drivers maintain a safe following distance from the vehicle ahead. This rule states that a driver should ideally stay at least two seconds behind the vehicle in front of them, allowing sufficient time to react in case the leading vehicle suddenly slows down or stops. To use the two-second rule, a driver can choose a fixed point on the road (like a sign or a tree) and then start counting as the vehicle in front passes that point. If the driver reaches the same point before finishing the count of two seconds, they are too close and should increase their distance.

This practice is crucial for preventing rear-end collisions and ensures that drivers have enough space to react to unexpected changes in traffic conditions. It applies regardless of the speed at which a driver is travelling, making it a versatile approach to safe driving across various situations.

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Determining the speed limit in construction zones

Understanding the stopping distance on different terrains

Calculating fuel efficiency

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