Who is allowed to make a U-turn by crossing the median on an interstate highway?

• Any vehicle during low traffic
• Only emergency or highway maintenance vehicles
  Explanation:

  "It is unsafe to back up on an interstate highway to reach a missed exit. If you miss an exit, you must drive to the next exit. It is illegal for any vehicle, other than an emergency vehicle or a highway maintenance vehicle, to make a U-turn by crossing the median or crossover of an interstate highway."
• Vehicles with hazard lights on
• Commercial trucks only