What are the requirements for light rail transit crossings?

• There are no specific requirements.
• They require pedestrians, cyclists, and motorists to use caution in these locations.
  Explanation:

  "Light rail transit (LRT) crossings in Calgary and Edmonton are similar to other railway crossings and require pedestrians, cyclists, and motorists to use caution in these locations."
• They require pedestrians to cross over whenever they want.
• None of the above.