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Difficulty: MediumSpace to Cross or Enter Traffic

When entering a traffic flow from a complete stop, a commercial driver requires a substantially larger gap in traffic than a passenger car driver because commercial vehicles accelerate much more slowly and take longer to reach traffic speed.

Answer: Answer

Answer

True
The statement is true because commercial motor vehicles have a much higher weight-to-power ratio and take significantly more time to accelerate from a stop to cruising speed. As a result, commercial drivers must judge and wait for a much larger opening in traffic than would be necessary in a passenger car.

Step-by-Step Solution

1
Analyze commercial vehicle acceleration characteristics
Due to high gross vehicle weight and multiple gear changes, commercial vehicles accelerate considerably slower than passenger vehicles.
Understanding acceleration limitations is essential for calculating traffic entry requirements.
2
Evaluate the time and distance needed to merge up to prevailing speed
A heavy vehicle requires extended time and distance to reach the speed of highway traffic without causing traffic friction.
Safe traffic entry depends on reaching traffic speed before oncoming vehicles close the distance.
3
Determine the required gap size in oncoming traffic
A substantially larger gap in traffic is necessary to enter safely compared to the gap needed by a standard car.
Larger gaps compensate for the slow acceleration and length of the commercial vehicle.

Key Concept

Commercial Vehicle Acceleration Lag and Traffic Entry Gap Requirements
Estimated Time:1m 0s
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Topics

Space to Cross or Enter Traffic

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