What do the warning devices and signs at a light rail transit crossing indicate?

• Stop and do not cross the tracks.
  Explanation:

  "Light Rail Transit (LRT) systems are powered by electricity, making them quiet and harder to hear. At LRT crossings, you will encounter warning devices such as traffic signal lights, signs, bells, and gates, all of which are designed to signal stop and not cross the tracks for your safety. "
• Start and cross the tracks.
• Tell the vehicles to speed up and cross the tracks.
• None of the above.