Go to Google maps app - Send feedback button-Edit the map option
Point the editing Road sigments - Next button
Type The new name of the road. If any error on road .you can tick below options and describe the facts- send button
Go to Google maps app - swipe left- send feedback- Edit the Map- point the editing Road- fill the name ,are changing the error on road and describe- send button
After verified Google approved the name card , you will received mail