Whose responsibility is it to know and comply with the speed limit while driving?

• Passengers in the vehicle are responsible to monitor the speed limit.
• The law enforcement officers are responsible to educate the speed limit obligations to drivers.
• The drivers are responsible for knowing and complying to the speed limit.
  Explanation:

  "Speeding is against the law. Drivers are required to obey the speed limit and are responsible for being aware of the speed limits while driving."
• The legal guardians of drivers are responsible for teaching them speed limit rules.