What do orange, revolving lights on a vehicle signify?

The correct interpretation of orange, revolving lights on a vehicle is that they indicate a warning or alert, particularly related to service or maintenance activities, not that cars have the right of way. In many jurisdictions, including Illinois, these lights are commonly used on vehicles engaged in construction, maintenance, or other roadside work. They serve to inform other drivers to approach with caution, as the vehicle may be operating in a potentially hazardous area.

The other interpretations do not align with this use of orange lights. For example, while emergency vehicles typically utilize red and blue lights to denote urgency and priority on the road, orange lights primarily convey a need for caution rather than signaling that cars have the right of way. Understanding the significance of these lights is crucial for ensuring safe driving practices around such vehicles.