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Difficulty: MediumLarge Commercial Trucks and No-Zones

If a large commercial tractor-trailer swings left into an adjacent lane before turning right, it is safe for a following vehicle to pass the truck on its right side.

Answer: Answer

Answer

False. Drivers should never attempt to pass a large commercial truck on the right when it is preparing to make a right turn, even if the truck swings left into an adjacent lane.
The statement is false because large commercial trucks frequently require extra turning radius and must swing left before executing a right-hand turn. Passing on the right during this maneuver traps the vehicle in the truck's largest blind spot (the right-side No-Zone) and leads to 'squeeze play' collisions.

Step-by-Step Solution

1
Analyze the turning mechanics of a large commercial tractor-trailer.
Because of vehicle length and off-tracking, the rear wheels of a trailer follow a tighter path than the front cab, requiring the driver to swing left to make a right turn safely.
Without swinging left, the trailer wheels would hit the curb or sidewalk objects on the right.
2
Evaluate the hazard of passing on the right side during this maneuver.
Occupying the open space to the right places the vehicle directly in the truck's extensive right-side No-Zone and in the path of the turning trailer.
The truck driver cannot see vehicles in the right blind spot and will squeeze the vehicle between the trailer and the curb.

Key Concept

Wide Right Turns and Right-Side No-Zone Safety
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Topics

Large Commercial Trucks and No-Zones

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