Practice question

When a flashing circular red signal is used as a beacon to supplement another sign, what does MUTCD limit it to supplementing?

  1. STOP, DO NOT ENTER, or WRONG WAY signs and other stop-required applications described by the standard
  2. Any green guide sign
  3. Only speed advisory plaques
  4. Only blue service signs

Answer: A — STOP, DO NOT ENTER, or WRONG WAY signs and other stop-required applications described by the standard

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