What should you do when your disabled vehicle is stopped on a highway?

• Stand behind the vehicle to signal other drivers.
• Avoid blocking tail lights, and place a warning sign just behind the vehicle and another at 300 feet back.
  Explanation:

  "When your disabled vehicle is stopped on the highway, make sure you never block tail lights at night by standing or working behind the vehicle. Day or night put a flare or other warning sign just behind the vehicle. Put another warning device at least 300 feet back (about 120 paces)."
• Leave the vehicle and walk to the nearest exit.
• Place a warning device only during the day.