@truckingwithcj: Here is a very brief explanation of what the signs are on a dangerous vehicle in Australia. You will find these located on each side and the rear of a tank. There are so many different codes for all the dangerous chemicals but here are 3 that you could find on a fuel tanker. If the truck has fuel you’ll also notice a red diamond on the front of the truck but if diesel only the diamond will be blank. #fueltanker #dgsigns #trucksafety