Which symbol is commonly used for indicating work zones?

The symbol commonly used for indicating work zones is construction cones. These cones are highly visible and specifically designed to alert drivers to changes in traffic patterns due to construction or maintenance activities. They serve multiple purposes: guiding traffic away from hazardous areas, marking out detours, and helping to ensure the safety of both workers and motorists. Their bright colors and reflective materials enhance visibility, especially during low light conditions, making it clear that drivers need to exercise caution.

While stop signs and yield signs are important traffic control devices, they are typically used in standard roadway situations rather than specifically to denote work zones. A checkered flag is more associated with racing and does not convey any safety or control message relevant to roadway work zones. Therefore, construction cones are the most effective and recognized symbol for indicating areas where traffic patterns are altered due to construction-related activities.