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Difficulty: EasySpeed Limits and Speed Regulation

A driver is traveling on a highway with a posted speed limit of 55 mph when sudden heavy rain creates standing water on the road surface. According to the Basic Speed Law, what is the driver legally required to do regarding their speed?

  1. Reduce speed below the posted maximum to a rate that is safe for the wet road conditions.Answer
  2. B
    Maintain the posted speed limit of 55 mph as long as visibility remains clear.
  3. C
    Increase speed slightly to pass through the rainstorm area as quickly as possible.
  4. D
    Match the speed of surrounding traffic even if other vehicles are driving at unsafe speeds.

Answer

The driver is legally required to reduce their speed below the posted maximum to a rate that is reasonable and safe for the wet road conditions.
The Basic Speed Law prohibits driving faster than is safe for current road, traffic, and weather conditions. When heavy rain creates standing water and reduces vehicle control, drivers must slow down below the posted limit to maintain safe operation.

Step-by-Step Solution

1
Evaluate the current road and weather conditions.
Heavy rain and standing water impair vehicle traction and increase stopping distances.
Posted speed limits represent maximum safe speeds under ideal, dry conditions.
2
Apply the Basic Speed Law.
The driver must slow down to a speed that reflects the reduced traction.
Driving at the posted limit during hazardous weather violates the requirement to operate safely for existing conditions.

Key Concept

Basic Speed Law in Adverse Weather
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Topics

Speed Limits and Speed Regulation

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