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Difficulty: HardRegulatory Signs

A driver on a two-lane highway marked with a broken yellow centerline approaches a section of road where a rectangular black-and-white regulatory sign reading 'DO NOT PASS' is posted. Directly ahead, a farm tractor is moving at 15 mph in a 55 mph zone. Which of the following actions is legally required of the driver?

  1. Remain behind the tractor without passing until reaching a location where passing is no longer prohibited by regulatory signs or pavement markings.Answer
  2. B
    Overtake the tractor carefully across the yellow line, because the basic speed law allows passing slow-moving vehicles in prohibition zones when traffic is clear.
  3. C
    Treat the 'DO NOT PASS' sign as an advisory warning that only applies when oncoming traffic is actively visible in the opposing lane.
  4. D
    Pass the tractor by executing a lane shift onto the paved right shoulder after coming to a temporary stop behind the tractor.

Answer

The driver must remain behind the slow-moving tractor without passing until reaching an area where passing is legally permitted.
Rectangular black-and-white signs are regulatory signs that communicate enforceable traffic laws. A posted 'DO NOT PASS' sign creates an absolute legal restriction prohibiting vehicles from passing, overriding broken yellow line markings and remaining mandatory even when following exceptionally slow traffic.

Step-by-Step Solution

1
Identify sign classification and legal status
Recognize that a rectangular black-and-white sign reading 'DO NOT PASS' is a regulatory sign establishing an absolute legal restriction.
Regulatory signs inform drivers of specific traffic laws and legal mandates that must be obeyed.
2
Evaluate conflict between pavement markings and posted sign
Determine that a posted regulatory sign supersedes standard broken yellow centerline markings.
When a specific regulatory sign is posted prohibiting passing, its command takes precedence over general roadway pavement line markings.
3
Assess potential exceptions for slow-moving vehicles
Conclude that no statutory exception allows crossing into opposing lanes in a posted 'DO NOT PASS' zone merely due to a slow-moving vehicle.
Regulatory passing prohibitions apply strictly regardless of the speed of the preceding vehicle.

Key Concept

Regulatory Sign Precedence and Mandatory Compliance
Estimated Time:1m 30s
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Topics

Regulatory Signs

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