United States Permit Test Coach
Guide and service signsQuestion 83 of 223
White diamond on a black square panel

A black panel with a white diamond is on a lane sign. What type of lane is it?

  1. A lane for buses and taxis only
  2. A bicycle lane
  3. A lane for vehicles that pay a toll
  4. A lane for high-occupancy vehicles (HOV)
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Correct answer: A lane for high-occupancy vehicles (HOV)

The diamond symbol is used only for high-occupancy vehicle lanes. HOV lanes have a minimum number of people in the vehicle.

Source: Manual on Uniform Traffic Control Devices for Streets and Highways (MUTCD), 11th Edition with Revision 1 (FHWA, December 2025), Section 2G.03 Regulatory Signs for Preferential Lanes – General, page 453

Practice guide and service signs

Questions last reviewed: 18 October 2026