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Difficulty: MediumSpeed Limits and Speed Regulation

A motorist is driving on a rural unpaved roadway with loose gravel surface conditions where the posted maximum speed limit is 55 mph55\text{ mph}. The loose gravel significantly reduces tire traction and increases stopping distances. Under the Basic Speed Law, which of the following best describes the driver's legal obligation regarding speed?

  1. The driver must reduce speed below the posted 55 mph55\text{ mph} limit to a speed that is safe and reasonable for the loose gravel surface conditions.Answer
  2. B
    The driver is legally permitted to maintain 55 mph55\text{ mph} because posted speed limits represent the safe operating speed for all weather and road surface conditions.
  3. C
    The driver must continue traveling at 55 mph55\text{ mph} unless a temporary construction warning sign or traffic officer explicitly mandates a lower numerical limit.
  4. D
    The driver must automatically reduce speed to 15 mph15\text{ mph} because all unpaved rural roads carry a statutory maximum speed restriction.

Answer

The driver must reduce speed below the posted 55 mph55\text{ mph} limit to a speed that is safe and reasonable for the loose gravel surface conditions.
The Basic Speed Law mandates that a driver must never operate a vehicle at a speed greater than is reasonable or prudent given weather, visibility, traffic, and roadway surface conditions. On loose gravel roads, traction is compromised, requiring the driver to reduce speed below the posted maximum limit to maintain proper control.

Step-by-Step Solution

1
Identify the relevant traffic regulation governing speed under non-ideal road conditions.
The Basic Speed Law dictates safe vehicle speed based on existing hazards and traction.
Posted speed limits establish the absolute maximum speed permitted under ideal conditions, not a guaranteed safe speed for compromised surfaces.
2
Evaluate the current road conditions against the posted limit.
Loose gravel decreases tire friction and increases stopping distance, making driving at 55 mph55\text{ mph} hazardous.
Driving at the posted limit when road traction is severely compromised violates the legal requirement to operate safely.

Key Concept

Basic Speed Law
Estimated Time:1m 0s
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Topics

Speed Limits and Speed Regulation

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