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Difficulty: EasySpeed Limits and Speed Regulation

You are driving on a roadway with a posted speed limit of 45 mph45\text{ mph}, but traffic has become extremely heavy and congested, forcing vehicles to slow down significantly. According to traffic safety laws, how should you regulate your speed in this scenario?

  1. Adjust your speed downward to safely match the heavy traffic flow, regardless of the posted 45 mph45\text{ mph} maximum limit.Answer
  2. B
    Maintain 45 mph45\text{ mph} because posted speed limits indicate the legally required minimum speed for all lane conditions.
  3. C
    Drive on the shoulder of the road to maintain the posted 45 mph45\text{ mph} speed around slower vehicles.
  4. D
    Drive at 45 mph45\text{ mph} unless flashing yellow school zone indicators are active nearby.

Answer

Adjust your speed downward to safely match the heavy traffic flow, regardless of the posted 45 mph45\text{ mph} maximum limit.
The Basic Speed Law dictates that a driver must never drive faster than is safe for current road, weather, and traffic conditions. When traffic is congested, driving at a reduced speed that maintains a safe following distance is legally required, even if it is well below the posted maximum limit.

Step-by-Step Solution

1
Identify the existing traffic conditions and posted limits
The road has heavy, congested traffic and a maximum posted speed limit of 45 mph45\text{ mph}.
Safe speed selection depends on both posted statutory rules and real-time environment factors.
2
Apply the Basic Speed Law rule
The law requires driving at a safe, reasonable speed for current conditions, even if that speed is below the posted maximum limit.
Driving at the maximum posted limit in dense traffic creates a high risk of rear-end collisions.

Key Concept

Basic Speed Law in Heavy Traffic
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Topics

Speed Limits and Speed Regulation

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