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Difficulty: MediumWork Zone Safety and Construction Hazards

You are driving through a highway construction zone on a rainy afternoon where the posted reduced speed limit is 45 mph. Rain and active earth-moving equipment have caused mud and standing water to accumulate on the travel lane. Under the basic speed law, which speed should you maintain?

  1. A speed slower than 45 mph that is safe and prudent for the wet, muddy road conditionsAnswer
  2. B
    Exactly 45 mph, because posted work zone speed limits are legally required speeds regardless of weather
  3. C
    The normal unposted highway speed limit, because temporary work zone speed limits only apply during clear weather
  4. D
    A speed slightly above 45 mph to pass through the mud and hazardous construction area as quickly as possible

Answer

Drive at a speed slower than 45 mph that is safe and prudent for the wet, muddy road conditions.
Under the basic speed law, you must never drive faster than is safe for present conditions. When a work zone has standing water and mud, traction is compromised, so you must reduce your speed below the posted 45 mph limit to maintain safe control of your vehicle.

Step-by-Step Solution

1
Identify the posted work zone speed limit and existing environmental hazards.
The posted limit is 45 mph, but rain, mud, and standing water significantly reduce tire traction.
Recognizing reduced traction conditions is essential for applying safe driving principles.
2
Apply the basic speed law rule to the scenario.
The basic speed law mandates that a driver must never drive faster than is safe for present conditions, regardless of the posted limit.
Posted speed limits set the maximum speed allowed under ideal driving conditions; adverse hazards require lower speeds.

Key Concept

Basic Speed Law in Work Zones
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Topics

Work Zone Safety and Construction Hazards

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