What traffic condition does the warning 'Road narrows on the right' denote?

The warning 'Road narrows on the right' indicates a change in lane dimensions to the right. This sign serves to alert drivers that the width of the roadway is decreasing, which may require adjustments in their driving, such as reducing speed and being prepared to share the roadway with other vehicles or obstacles. Acknowledging this warning is crucial for maintaining safe driving practices and preventing potential accidents that could arise from unexpected changes in road conditions. Understanding this information helps drivers navigate through areas where the road may not accommodate the usual number of lanes or width, promoting safety for all road users.