What does an orange construction sign indicate?

Answer: A — Warning of road work ahead

An orange construction sign is specifically used to alert drivers to the presence of work zones or construction activities on or near the road. This type of sign is critical for ensuring safety, as it indicates that drivers should be prepared for potential changes in road conditions, such as lane closures, detours, or slower speeds. The use of orange in these signs is intended to catch the attention of motorists and convey the message that there may be workers or equipment present, which requires increased vigilance while driving. The other options do not accurately represent the purpose of an orange construction sign. For example, a pedestrian zone is typically marked with a different kind of signage, often using different colors that relate to pedestrian safety. Similarly, reminders for speed limits and notifications about changes in traffic signals use distinct signage that communicates those specific regulatory messages effectively.