What should you do when people are boarding or exiting a bus, streetcar, or trolley without a safety zone?

• Stop behind the vehicle's nearest door or platform until passengers have safely boarded or exited.
  Explanation:

  "When people are boarding or exiting a bus, streetcar, or trolley without a safety zone, stop behind the vehicle’s nearest door or platform. Wait for the passengers to reach a safe place and then proceed."
• Pass the vehicle quickly to avoid delay.
• Honk your horn to alert passengers to hurry up.
• Change lanes to avoid the bus, streetcar, or trolley.