What color lights indicate a general warning for drivers?

The correct indication for a general warning to drivers typically involves using red and yellow lights. In many jurisdictions, red lights indicate a stop or prohibited action, while yellow lights signal caution or a warning. Therefore, red and yellow together serve to alert drivers to potential hazards or changes in traffic conditions, allowing them to proceed with heightened awareness. The use of both colors together effectively communicates urgency and the need for caution.

In contexts where traffic lights or warning lights are used, red and green would generally represent stop and go signals, respectively, which would not convey a warning. Red and blue are often associated with emergency vehicles, while red and white combinations may apply to specific road signs or indicators. Thus, red and yellow clearly align with general warning signals for drivers.