Final answer:
When an expressway lane is closed for construction, it is important to use only lanes open for traffic and follow the posted speed limit. Using the shoulder or median as driving lanes is not recommended.
Step-by-step explanation:
When an expressway lane is closed for construction, it is important to follow the rules of the road. The correct action to take is to use only lanes open for traffic, which means using the lanes that are not closed for construction. This ensures the safety of both the driver and the construction workers.
Using the shoulder or the median as a driving lane is not the right choice, as these are designated for specific purposes and using them as driving lanes can lead to accidents or disruptions in traffic flow.
Additionally, it is important to drive at the appropriate speed when encountering construction zones. Following the posted speed limit and any additional speed restrictions is crucial for everyone's safety.