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Difficulty: MediumSpeed Limits and Speed Regulation

A driver is traveling on a multi-lane highway with a posted maximum speed limit of 65 mph65\text{ mph}. A torrential downpour has created areas of standing water across the roadway, reducing tire traction and visibility. Under standard traffic safety laws, what speed should the driver maintain under these conditions?

  1. Reduce speed below 65 mph65\text{ mph} to a rate that is reasonable and prudent for the wet road conditions and reduced visibility.Answer
  2. B
    Maintain the posted limit of 65 mph65\text{ mph} because statutory maximum speed limits apply equally in all weather conditions.
  3. C
    Increase speed slightly above 65 mph65\text{ mph} to pass through the hazardous standing water as quickly as possible.
  4. D
    Maintain a strict minimum speed of 55 mph55\text{ mph} at all times to prevent obstructing highway traffic behind the vehicle.

Answer

The driver must reduce speed below the posted maximum limit to a rate that is safe and prudent given the heavy rain, standing water, and reduced visibility.
The Basic Speed Law mandates that no person shall drive a vehicle at a speed greater than is reasonable or prudent having due regard for weather, visibility, traffic, and road surface conditions. When rain and standing water impair traction, safety requires driving at a reduced speed below the posted limit.

Step-by-Step Solution

1
Identify the applicable traffic rule for speed regulation in adverse conditions.
Recognize that the Basic Speed Law applies whenever environmental conditions impair safety.
Posted speed limits establish the maximum permissible speed only under ideal weather, traffic, and road conditions.
2
Evaluate the current road and weather conditions described in the scenario.
Torrential rain and standing water reduce tire grip and visibility, creating hazardous driving conditions.
High speeds on wet roads with standing water drastically increase stopping distances and hydroplaning risks.
3
Determine the legal driving behavior required.
The driver is legally required to reduce vehicle speed below 65 mph65\text{ mph} to maintain safe control.
Driving at a speed reasonable for prevailing conditions ensures compliance with safety regulations.

Key Concept

Basic Speed Law
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Topics

Speed Limits and Speed Regulation

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