Usually Fire Hydrants has yellow/red panted area on the curb each side of it. The fire truck going to be in the street. Most fire hydrants have three sided hook up. That IMO why the need the 15 feet street access. It the hydrant right beside you drive way then you couldn't part in front of the hydrant. I don't think it that difficult to figure out. Don't park in front of the hydrant or in the yellow/red tow zone. It I feel don't have tow zone still don't park in front of it.