It has become the custom of many drivers to put out their right hand, dangling, while driving.
This is a most dangerous way to drive. If an emergency occurs, the drivers' reaction will be slowed down due to the fact that they are using only one hand to drive.
This laissez-faire attitude is typical of the driver who just ignores the right way to drive.
This is another incentive for the traffic wardens to give fines to these drivers.