What must you do when you see this sign?

• Ignore it and proceed normally.
• Speed up to clear the intersection quickly.
• Come to a complete stop and wait for a new green signal.
• Proceed with caution, being aware that opposing traffic may still be moving through the intersection.
  Explanation:

  "When drivers see this sign, they must proceed cautiously, aware that opposing traffic may still be moving through the intersection. This sign is a warning to be extra vigilant as the usual timing of the lights may not apply, and there could be oncoming vehicles."