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Difficulty: MediumSpeed Limits and Speed Regulation

A motorist is driving on a multi-lane highway with a posted maximum speed limit of 55 mph55\text{ mph} during a severe rainstorm that creates significant standing water and severely limits visibility. Although the driver stays at exactly 55 mph55\text{ mph}, a law enforcement officer issues a citation for driving at an unsafe speed. Which of the following statements best explains why this traffic citation is legally justified?

  1. The Basic Speed Law mandates that a driver must never operate a vehicle at a speed greater than is reasonable or prudent given current road and weather conditions, regardless of the posted maximum limit.Answer
  2. B
    Posted maximum speed limits guarantee a legal safe-harbor, meaning a driver cannot be cited for speed as long as they do not exceed the numerical limit.
  3. C
    Speed regulation laws automatically reduce all posted highway limits by exactly 15 mph15\text{ mph} as soon as windshield wipers are activated.
  4. D
    Driving at the posted speed limit during rain is only unlawful if the vehicle is carrying more than two passengers.

Answer

The citation is justified because the Basic Speed Law requires drivers to adjust their speed for hazardous road and weather conditions, regardless of the posted speed limit.
The correct answer states that under the Basic Speed Law, drivers are legally required to operate their vehicle at a safe and prudent speed for existing conditions. Even if a driver stays within the posted maximum numerical speed limit, severe weather, reduced visibility, or wet pavement makes driving at that posted limit unsafe and illegal.

Step-by-Step Solution

1
Identify the environmental conditions described in the scenario
Severe rainstorm with standing water and poor visibility on a 55 mph55\text{ mph} highway.
Posted speed limits apply only to ideal driving conditions (clear weather, dry pavement, light traffic).
2
Apply the Basic Speed Law to the scenario
Driving 55 mph55\text{ mph} in standing water and low visibility creates hydroplaning and collision hazards, making that speed unreasonable and imprudent.
The legal standard requires drivers to reduce speed below posted maximums when hazards are present.

Key Concept

Basic Speed Law
Estimated Time:1m 0s
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Topics

Speed Limits and Speed Regulation

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