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Difficulty: HardAlcohol and Drug Regulations

During a routine roadside safety inspection at a state weigh facility, an authorized enforcement officer conducts an evidential breath alcohol screening on a commercial motor vehicle driver. The test reveals an alcohol concentration of 0.028%. The driver exhibits no outward signs of physical impairment and argues that this level falls well below the 0.04% commercial threshold. Under Federal Motor Carrier Safety Administration (FMCSA) safety regulations, what immediate enforcement action must be taken regarding this driver?

  1. A
    The driver may continue operating the commercial vehicle without penalty because their concentration remains strictly below the 0.04% legal intoxication standard.
  2. The driver must immediately be placed out of service for a minimum duration of 24 consecutive hours.Answer
  3. C
    The driver must be permitted to resume operating once they rest in the sleeper berth for two hours and drink water.
  4. D
    The driver must receive an immediate one-year commercial driver license disqualification and be referred to a Substance Abuse Professional.

Answer

The driver must immediately be placed out of service for a minimum duration of 24 consecutive hours.
Under Federal Motor Carrier Safety Regulations (49 CFR § 392.5 and § 382.505), any commercial driver found to have any detectable alcohol or a measured concentration of 0.02% or higher must be placed out of service immediately for a minimum of 24 consecutive hours. This prevents the driver from performing safety-sensitive functions while any measurable alcohol metabolizes.

Step-by-Step Solution

1
Analyze the measured BAC level from the roadside screening.
The driver tested at a BAC of 0.028%, which is greater than or equal to 0.02% but strictly below 0.04%.
FMCSA establishes tiered operational thresholds for commercial drivers based on specific alcohol concentration ranges.
2
Differentiate between the CDL disqualification threshold and the immediate out-of-service threshold.
A concentration of 0.04% or greater constitutes a major disqualifying violation (1-year CDL disqualification), whereas a concentration of 0.02% to 0.039% triggers an immediate 24-hour out-of-service order under 49 CFR § 392.5 and § 382.505.
Federal safety rules enforce zero-tolerance principles to prevent commercial driving while any measurable alcohol remains in the body.
3
Select the required regulatory enforcement action.
Enforcement must place the driver out of service for 24 hours immediately.
The driver cannot perform safety-sensitive functions until the mandatory 24-hour out-of-service window expires.

Key Concept

FMCSA 24-Hour Out-of-Service Rule for Detectable Alcohol (0.02% to 0.039% BAC)
Estimated Time:1m 30s
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Topics

Alcohol and Drug Regulations

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