Question

Difficulty: MediumLarge Commercial Trucks and No-Zones

While driving on a roadway with multiple lanes traveling in the same direction, you find yourself traveling in the lane directly to the left of a large commercial tractor-trailer. Why is it unsafe to remain in this position for an extended period of time?

  1. The tractor-trailer still has a significant left-side blind spot that can hide your vehicle from the driver's view.Answer
  2. B
    Commercial truck drivers have full side-mirror visibility on their left side, so cruising there forces the truck to reduce speed.
  3. C
    Large commercial trucks are legally required to change lanes to the left whenever another vehicle approaches from behind.
  4. D
    Traveling beside the cab of a commercial vehicle automatically disables your vehicle's side-collision warning systems.

Answer

The tractor-trailer still has a significant left-side blind spot that can hide your vehicle from the driver's view.
Large commercial trucks have blind spots (No-Zones) on the front, rear, and both sides. Although the left-side No-Zone is smaller than the right-side No-Zone, it still extends along the side of the truck. Lingering beside a truck makes it difficult or impossible for the truck driver to see your vehicle in their side mirror.

Step-by-Step Solution

1
Identify the vehicle type and positioning scenario.
Your passenger vehicle is traveling directly alongside the left side of a large commercial tractor-trailer.
Large commercial vehicles have large blind spot areas, known as No-Zones, on all four sides.
2
Evaluate the visibility and safety risks associated with the left side No-Zone.
Although the driver's side blind spot is smaller than the right side blind spot, it still extends along the cab and side of the trailer.
If the truck driver cannot see your vehicle in their side mirror, they may attempt a lane change into your lane, causing a collision.

Key Concept

Left-Side No-Zone Awareness
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