What is the primary purpose of shoulder signs in work zones?

The primary purpose of shoulder signs in work zones is to provide clear information about upcoming changes. These signs are strategically placed to alert drivers to alterations in traffic patterns, such as lane closures, construction activities, or other hazards present due to the work being conducted. By providing this clear and immediate information, shoulder signs help ensure that drivers have adequate time to react, adjust their speed, and navigate safely through the work zone.

Effective communication through these signs is critical in maintaining safety for both motorists and construction workers. The information conveyed allows drivers to anticipate the conditions they will encounter, reducing confusion and the likelihood of accidents. This proactive approach is essential in managing traffic flow and protecting everyone involved in or around the work area.