Why ambulance is written opposite on front side of ambulance?

The word "AMBULANCE" is not written opposite on the front side of an ambulance. It is typically displayed in a consistent and legible manner so that it can be easily recognized and understood by other road users. The purpose of displaying the word "AMBULANCE" on the front of the vehicle is to clearly identify it as an emergency medical service vehicle and to alert other drivers to yield the right of way to allow it to pass safely and quickly.