A tractor-trailer travelling at high speeds creates air turbulence in which of the following areas?
- Directly in front
- Alongside the cab
- At the immediate rear
- All of the above ✓
Answer: D. All of the above
All of the above: directly in front, alongside the cab, and at the immediate rear.
Why this is the answer
The handbook says large vehicles traveling at high speeds create air turbulence that can be hazardous to smaller vehicles. It describes a car, bicycle, or other road user directly in front of a truck, alongside the cab, near the back of the trailer, or at the immediate rear as being in an area of air turbulence. Because each area named in the choices is included in that description, the correct choice is all of the above.
Why the other answers are wrong
- A. Directly in front — Directly in front is only one of the turbulent areas named; the handbook also includes the cab side and trailer rear.
- B. Alongside the cab — Alongside the cab is only one of the turbulent areas named; the handbook also includes directly in front and the trailer rear.
- C. At the immediate rear — At the immediate rear is only one of the turbulent areas named; the handbook also includes directly in front and alongside the cab.
Remember it
Picture the truck as a moving wind zone that reaches in front, beside the cab, and behind the trailer.