What is indicated by continuity lines on the right side of the lane you're driving in?

• You are not required to do anything unless you want to exit. Your lane is unaffected
  Explanation:

  "You are not required to do anything unless you want to exit. Your lane is unaffected"
• You must merge with the traffic to your left
• You must merge with the traffic to your right
• You must change the lane as your lane is exiting or ending