Between sunrise and sunset, buses, cars for hire having a capacity for over ten passengers, cars or trucks used as wreckers or for other towing purposes, freight carrying vehicles and combinations thereof, shall be equipped with two red flags, one to be placed 100 feet behind and the other 100 feet ahead of said parked vehicles and in such a position as to be visible to all approaching traffic during the daylight hours.
La. R.S. § 32:369