What should you do when entering a tunnel with heavy traffic?

• Listen to the radio for updates and keep a safe distance from other vehicles
• Note the location of emergency exits
• Follow instructions from officials and message signs
• All of the above
  Explanation:

  "When entering a tunnel with heavy traffic, listen to the radio for updates, keep a safe distance from other vehicles, note the location of emergency exits, and follow the instructions of MassDOT officials, State Police, and message signs."