When may a vehicle cross a lane line in a work zone?

• A. Any time
• B. Only when traffic control devices or personnel authorize movement and signal safe clearance
• C. Only during daytime
• D. After passing through an intersection

Answer: (B)

In work zones, moving across lane lines is strictly controlled to protect workers and other drivers. You may cross a lane line only when traffic control devices or personnel authorize the movement and signal that it is safe. That authorization comes from flaggers or temporary signals/signs that confirm there is a clear gap, no workers or equipment in the path, and that it’s safe to change lanes or enter the next lane.

Think of it as following the instructions of those managing the work zone and only proceeding when they indicate it’s safe. Crossing without that signal or moving when a lane is closed would put people at risk and can violate traffic control rules. The other options imply time-based or unconditional permission, which isn’t how work zones operate.