What should you do when you encounter traffic control devices in road construction areas?

• Ignore the signals and maintain regular speed for quicker passage.
• Maintain speed and only slow down for visible road obstructions.
• Reduce speed and use caution as directed by signs, flaggers, or law enforcement.
  Explanation:

  "Various traffic control devices are used in road construction and maintenance work areas to direct drivers and pedestrians safely through the work site. If you come across any such signs or are given instructions by flaggers or law enforcement officers, you must be prepared to reduce your speed, exercise caution, and do as directed."
• None of the above.