Driver's License Test Prep
US Road Signs Warning Signs

What should a driver do when approaching this Slippery When Wet sign?

Yellow diamond with a black border showing a black silhouette of a car with two wavy skid trails behind its rear wheels.
  1. A.
    Reduce speed and avoid sudden moves like hard braking. Correct
  2. B.
    Come to a full stop before continuing onto the wet pavement.
  3. C.
    Pull off the roadway until the pavement fully dries.
  4. D.
    Turn on hazard lights and maintain the posted speed.
The Why

The answer is "Reduce speed and avoid sudden moves like hard braking."

The sign warns that the road surface ahead loses traction in rain, snow, or ice, so you ease off the accelerator, add following distance, and keep every input on the wheel and pedals gentle. The trap is the choice that calls for a full stop; a yellow warning diamond flags what to expect, and a driver who reaches for the stop-sign rule at every diamond is applying a regulatory response to a caution.

Why the others miss

The traps in the wrong answers

B. Come to a full stop before continuing onto the wet pavement.

Confuses a yellow warning diamond with a regulatory stop sign; a warning sign flags a hazard rather than commanding a halt. This answer applies the stop-sign rule learned first to any diamond posted before a hazard.

C. Pull off the roadway until the pavement fully dries.

Treats a caution about traction as a prohibition against driving on wet pavement, but the sign expects a driver to adjust their driving, not to leave the road. This answer overreacts to a warning by taking the vehicle out of traffic altogether.

D. Turn on hazard lights and maintain the posted speed.

Reads a traction warning as a visibility advisory, and treating the speed limit as safe on slick pavement ignores the point of the sign. This answer assumes any wet-weather sign is a reminder about lighting rather than about grip.

The Rule

This question tests your knowledge of Warning Signs on the roads of every US state . Source: Manual on Uniform Traffic Control Devices, sign W8-5 (Slippery When Wet)..

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