Practice question

Trailers, semitrailers, and pole trailers that weigh more than 4,500 pounds but no more than 15,000 pounds and are operated at speeds over 30 mph

  1. must have a brake on the left wheel of the rear axle.
  2. are not required to have brakes.
  3. must have a brake on the right wheel of the rear axle.
  4. must have brakes on both wheels of the rear axle.

Answer: D — must have brakes on both wheels of the rear axle.

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Practice more: 2026 Texas Special Requirements CDL Practice Test 1 →