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Difficulty: MediumStopping and Braking Procedures

A driver is executing a routine, controlled stop in a commercial motor vehicle equipped with a manual transmission. In what chronological sequence should the driver perform these braking and vehicle control actions from first to last?

  1. 1Release the accelerator pedal to begin slowing down through engine compression.
  2. 2Apply smooth, progressive pressure to the service brake pedal.
  3. 3Depress the clutch pedal as the engine speed approaches idle.
  4. 4Bring the vehicle to a complete halt while holding the foot brake down.
  5. 5Shift the transmission into neutral and engage the parking brake.

Answer

The correct operational sequence begins with releasing the accelerator pedal, followed by applying progressive service brake pressure, depressing the clutch pedal as engine RPM nears idle, bringing the vehicle to a complete halt, and finally placing the transmission in neutral and setting the parking brake.
Proper basic vehicle control during a normal stop requires easing off the throttle first, applying steady service brake pressure to slow the vehicle, depressing the clutch only when engine speed nears idle to avoid stalling or coasting, holding the vehicle at a complete halt, and concluding with shifting to neutral and engaging the parking brake.

Step-by-Step Solution

1
Release the accelerator pedal.
Engine compression begins natural deceleration without causing abrupt weight transfer.
Allows initial deceleration and transitions the driver's foot to the brake pedal.
2
Apply smooth and steady pressure to the service brake pedal.
Mechanical braking decelerates the commercial vehicle safely and predictably.
Regulates stopping distance smoothly based on vehicle load and road traction.
3
Depress the clutch pedal when engine speed drops near idle (typically 100-200 RPM above idle).
Disengages the engine from the drivetrain just before stalling can occur.
Pushing the clutch in too early causes coasting (freewheeling), while waiting too long stalls the engine.
4
Bring the vehicle to a full and complete stop.
Forward motion stops entirely with the service brake holding the vehicle stationary.
Ensures the vehicle is completely stopped before gear changes and parking brake application.
5
Shift the transmission into neutral and set the parking brake.
The vehicle is secured in place, and drivetrain load is removed.
Standard parking securement procedure prevents accidental rollback or unintended movement.

Key Concept

Standard Commercial Motor Vehicle Stopping and Clutch Timing Procedure
Estimated Time:1m 0s
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Topics

Stopping and Braking Procedures

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