Final answer:
Stop at the intersection until the closed zone is clear for safety and to maintain proper traffic flow.
Step-by-step explanation:
When encountering a closed front zone at an intersection, the correct action to take is to stop at the intersection until the zone is clear. This is important for both the safety of pedestrians who may have to dodge traffic, as well as the overall flow of vehicles. Rapid acceleration or changing lanes suddenly can lead to accidents, especially in areas with high traffic density or near schools where reduced speed zones exist for safety. Instead, one should wait for the closed zone to open up or follow any detour directions provided.