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Difficulty: EasySpeed Limits and Speed Regulation

When driving through heavy fog that severely reduces visibility, what does the Basic Speed Law require a driver to do?

  1. A
    Maintain the posted maximum speed limit as long as the vehicle's hazard lights are active.
  2. Drive at a speed that is reasonable and prudent for current visibility, even if below the posted limit.Answer
  3. C
    Drive above the posted speed limit to exit the low-visibility area as quickly as possible.
  4. D
    Maintain the maximum speed limit because posted signs always determine the mandatory speed.

Answer

Drive at a speed that is reasonable and prudent for current visibility, even if below the posted limit.
The Basic Speed Law dictates that a driver must never drive faster than is safe for present conditions. When visibility is severely reduced by fog, driving at the posted speed limit may be dangerous and illegal; drivers must slow down to a safe and prudent speed.

Step-by-Step Solution

1
Identify the driving condition described in the scenario.
The driver is navigating through heavy fog with severely reduced visibility.
Road and weather conditions determine safe operating parameters under traffic safety laws.
2
Apply the Basic Speed Law to reduced visibility conditions.
The law requires driving at a safe speed for existing conditions, regardless of the maximum posted speed limit.
Posted speed limits represent the maximum safe speed under ideal conditions, not adverse weather.

Key Concept

Basic Speed Law application in adverse weather conditions
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Topics

Speed Limits and Speed Regulation

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