In Canada, what does an orange diamond-shaped road sign generally warn drivers about?

In Canada, an orange diamond-shaped road sign generally warns drivers about temporary road work or other temporary traffic conditions.

Orange is used to distinguish temporary conditions from the permanent hazards and regulatory information shown by the ordinary sign system. A sign may warn of workers, lane closures, detours, changed alignment, or other conditions created by construction and maintenance activity. The diamond shape signals a warning, while the orange background adds the temporary-work-zone context.

Drivers should reduce speed, watch for workers and equipment, and follow any temporary regulatory signs displayed nearby. An orange sign can be accompanied by arrows, words, symbols, or distance information, so its exact message depends on the symbol or wording.

The sign should not be confused with a standard yellow warning diamond. Yellow is widely used for permanent warnings such as curves or intersections; orange indicates a temporary traffic-control environment. Canadian provinces and territories administer road signs, but orange work-zone warning conventions are broadly recognizable across the country.