What should you do to ensure you can hear the sound of an approaching train at a railroad crossing?

• Turn up the volume of your vehicle's radio
• Roll up your vehicle windows to block out other noises
• Roll down your vehicle windows and listen
  Explanation:

  "Roll down your vehicle windows and listen to make certain other noises do not block out the sound of a train."
• Ignore other noises and focus on watching for the train.