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Difficulty: MediumWeight Definitions and Limits (GVWR, GCWR, Axle Weights)

A driver is operating a two-axle straight truck towing a single-axle utility trailer. The truck has a manufacturer Gross Vehicle Weight Rating (GVWR) of 24,000 lb24,000\text{ lb}, and the utility trailer has a GVWR of 8,000 lb8,000\text{ lb}. The truck manufacturer establishes a Gross Combination Weight Rating (GCWR) of 30,000 lb30,000\text{ lb} for this towing configuration. At a highway scale, the straight truck weighs 23,500 lb23,500\text{ lb} and the trailer weighs 8,000 lb8,000\text{ lb}, resulting in an actual Gross Combination Weight (GCW) of 31,500 lb31,500\text{ lb}. Which of the following statements correctly evaluates the legal weight status of this combination?

  1. A
    The combination is operating legally because the total gross combination weight (31,500 lb31,500\text{ lb}) remains below the mathematical sum of the two individual vehicle GVWRs (32,000 lb32,000\text{ lb}).
  2. The combination is overloaded because the total operating weight exceeds the manufacturer's GCWR of 30,000 lb30,000\text{ lb}, even though neither individual vehicle exceeds its GVWR.Answer
  3. C
    The combination is operating legally because federal statutory interstate limits permit gross weights up to 80,000 lb80,000\text{ lb}, which overrides lower manufacturer ratings.
  4. D
    The combination is overloaded solely because loading any towed unit to 100%100\% of its individual GVWR is prohibited during commercial combination operation.

Answer

The combination is overloaded because the total operating weight exceeds the manufacturer's GCWR of 30,000 lb30,000\text{ lb}, even though neither individual vehicle exceeds its GVWR.
Gross Vehicle Weight Rating (GVWR) applies to a single isolated vehicle, whereas Gross Combination Weight Rating (GCWR) is the maximum allowable weight for the towing unit, towed unit, and cargo combined specified by the manufacturer. Although both the straight truck (23,500 lb≤24,000 lb23,500\text{ lb} \le 24,000\text{ lb}) and the trailer (8,000 lb≤8,000 lb8,000\text{ lb} \le 8,000\text{ lb}) are within their individual GVWRs, the total operating scale weight of 31,500 lb31,500\text{ lb} exceeds the specified GCWR limit of 30,000 lb30,000\text{ lb} by 1,500 lb1,500\text{ lb}, making the configuration legally overloaded.

Step-by-Step Solution

1
Evaluate individual vehicle weights against their respective Gross Vehicle Weight Ratings (GVWR).
The straight truck scale weight (23,500 lb23,500\text{ lb}) is within its GVWR of 24,000 lb24,000\text{ lb}, and the trailer scale weight (8,000 lb8,000\text{ lb}) is equal to its GVWR of 8,000 lb8,000\text{ lb}.
Both single units independently comply with their standalone structural weight limits.
2
Compare total actual scale weight (Gross Combination Weight, GCW) against the manufacturer's Gross Combination Weight Rating (GCWR).
Actual GCW=23,500 lb+8,000 lb=31,500 lb\text{GCW} = 23,500\text{ lb} + 8,000\text{ lb} = 31,500\text{ lb}, which exceeds the specified GCWR\text{GCWR} of 30,000 lb30,000\text{ lb} by 1,500 lb1,500\text{ lb}.
GCWR represents the maximum safe weight of the power unit plus the towed unit and all cargo combined; operating above this limit constitutes an overload condition regardless of individual unit compliance.

Key Concept

Distinction between GVWR (single unit limit) and GCWR (total combination limit)
Estimated Time:1m 15s
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Topics

Weight Definitions and Limits (GVWR, GCWR, Axle Weights)

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