What do red reflectors on the pavement indicate?

Red reflectors on the pavement indicate areas not to be entered or used, primarily alerting drivers to a prohibited section of the road. They are strategically placed to serve as a visual warning that indicates a potential hazard or a restriction, guiding drivers to avoid those areas for safety reasons. This color is universally associated with warnings and forbidden zones in traffic control, enhancing visibility and ensuring that drivers can quickly identify sections of the road that require caution or avoidance.

The other options do not accurately describe the function of red reflectors: parking zones are typically marked with different signage, speed limits are indicated by specific posted signs, and pedestrian crossings are usually marked with white lines and pedestrian signage. Red reflectors play a distinctive role in traffic safety by specifically denoting what a driver should not approach or enter.