United States Permit Test Coach
Guide and service signsQuestion 84 of 223

A guide sign shows a white diamond on black at its left edge. What does this tell you?

  1. The sign is for a toll lane
  2. The sign is for the HOV lane, not the general lanes
  3. The exit leaves from the left side
  4. The lane is for slow vehicles
Show answer

Correct answer: The sign is for the HOV lane, not the general lanes

A white diamond on a black background marks a guide sign for a preferential lane with an occupancy rule. Signs for the general lanes do not have it.

Source: Manual on Uniform Traffic Control Devices for Streets and Highways (MUTCD), 11th Edition with Revision 1 (FHWA, December 2025), Section 2G.10 Preferential Lane Guide Signs – General, page 463

Practice guide and service signs

Questions last reviewed: 18 October 2026