United States Permit Test Coach
Pavement markingsQuestion 154 of 223
Road lane seen from above with a large white diamond outline on the pavement.

What does this white diamond on a lane mean?

  1. The lane ends ahead
  2. Parking is allowed in the lane
  3. The lane is for emergency vehicles only
  4. The lane is for high-occupancy vehicles
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Correct answer: The lane is for high-occupancy vehicles

A white diamond marks a preferential lane for high-occupancy vehicles (HOV). The word message HOV can be used instead.

Source: Manual on Uniform Traffic Control Devices for Streets and Highways (MUTCD), 11th Edition with Revision 1 (FHWA, December 2025), Section 3E.03 Preferential Lane Word and Symbol Markings, page 649

Practice pavement markings

Questions last reviewed: 18 October 2026