The sign "Length of a distance of .....m" indicates specific distance limits or measurements on the road. It typically provides essential information about the length of a particular zone or area, such as a no-parking zone, or may indicate the distance from a certain point, like a restricted area or a speed limit sign.

For example, if the sign states "Length of a distance of 300m," it informs drivers that the designated rule (like no parking or a speed limit) applies for the next 300 meters.

Understanding these signs is crucial for following traffic regulations and ensuring road safety. Always pay attention to these signs to avoid penalties and ensure compliance with local traffic laws.