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Question

Difficulty: MediumWinter Driving, Snow, and Black Ice

While driving on a rural two-lane road covered with slush and patches of black ice, a driver maintains a speed of 45 mph, which is the posted speed limit. Which of the following statements correctly evaluates the driver's speed choice under traffic safety laws?

  1. The driver is violating the Basic Speed Law because driving at the posted limit is illegal when road conditions make that speed unsafe.Answer
  2. B
    The driver is complying with the law because posted speed limits represent the legally protected minimum safe driving speed.
  3. C
    The driver is driving safely as long as they maintain a standard three-second following distance behind preceding traffic.
  4. D
    The driver is only required to slow down if a advisory winter warning sign is physically posted along that specific stretch of road.

Answer

The driver is violating the Basic Speed Law because driving at the posted limit is illegal when road conditions make that speed unsafe.
The correct response explains that the Basic Speed Law requires drivers to adjust speed according to actual road conditions. Posted speed limits indicate the maximum allowable speed under ideal weather conditions. When driving on snow, slush, or black ice, traveling at the posted limit is extremely dangerous and illegal because reduced traction requires much slower speeds to maintain control.

Step-by-Step Solution

1
Identify the environmental hazards described in the scenario.
The road surface contains slush and patches of black ice, which severely diminish tire traction.
Recognizing reduced traction is essential for determining safe vehicle operating parameters.
2
Apply the Basic Speed Law to the observed road conditions.
The Basic Speed Law requires driving at a speed that is reasonable and prudent for existing conditions, which on ice and slush is significantly below the posted limit.
Posted speed limits are intended for ideal weather and dry pavement conditions only.
3
Evaluate the driver's actions against legal requirements.
Traveling at 45 mph on ice is unsafe and constitutes a violation of the Basic Speed Law despite matching the posted sign.
Drivers are legally responsible for reducing speed to maintain control when traction is degraded.

Key Concept

Basic Speed Law in Hazardous Winter Conditions
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Topics

Winter Driving, Snow, and Black Ice

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