Final answer:
When driving in reversible lanes with overhead lane signals, you must change lanes if the signal turns to a yellow X, moving to a lane marked with a green arrow to ensure safety and compliance with traffic regulations. The correct answer is option b.
Step-by-step explanation:
If you are driving on a road with reversible lanes marked with overhead lane signals and the lane signal above your lane turns to a yellow X, you must safely move to a lane that is indicated by a green arrow. The correct answer to this type of question is often option b, which states that you need to change lanes when the overhead signal changes to a yellow X. It's important to remember that reversible lanes are used to manage traffic flow during different times of the day, and lane signals are there to indicate if a lane is open or closed for use. The yellow X indicates that the lane is about to be closed or is no longer safe to drive in, so you should prepare to change lanes.