What does it mean if a bicyclist has a red or orange pennant flag on the antenna attached to their bike?

• The rider is indicating a turn
• The rider is signaling for help
• The rider has impaired hearing
  Explanation:

  "If you see a bicyclist with a red or orange pennant flag on the antennae attached to the bike, it indicates the rider has impaired hearing."
• The rider is riding in a designated bike lane