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Difficulty: MediumSpace Behind and Tailgaters

A commercial straight truck is traveling at 45 mph45\text{ mph} on a two-lane rural highway when a trailing passenger vehicle begins following within one car length of the rear bumper. According to standard CDL defensive driving procedures, which action should the commercial driver take to manage this hazard safely?

  1. A
    Flash the brake lights repeatedly to signal the trailing motorist to drop back
  2. B
    Accelerate above the posted speed limit until a substantial gap opens behind the truck
  3. Increase the following distance in front of the truck to avoid the need for sudden brakingAnswer
  4. D
    Pull abruptly onto the unpaved right shoulder while maintaining road speed to let the vehicle pass

Answer

Increase the following distance in front of the truck to avoid the need for sudden braking.
When followed too closely, a driver cannot directly increase the rear space cushion. The safest and most effective defensive action is to increase the following distance in front of the truck. This provides a generous forward safety buffer, eliminating the need for sudden stops and facilitating a gradual, controlled deceleration that protects both vehicles.

Step-by-Step Solution

1
Identify the primary danger created by a tailgating vehicle.
The truck cannot directly control the distance of the vehicle behind, but an abrupt stop will cause a rear-end collision.
Tailgaters dramatically reduce their own reaction distance, making sudden deceleration by the lead commercial vehicle hazardous.
2
Apply the core CDL defensive principle for managing space behind.
Open extra space cushion in front of the commercial vehicle.
Expanding forward space allows for gradual, progressive braking and gives the trailing driver adequate time to respond.

Key Concept

Managing Space Behind and Tailgaters
Estimated Time:1m 0s
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Topics

Space Behind and Tailgaters

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