You must be remember that driving a vehicle, notably a huge Fire Truck, requires alertness and proper coordination of your eyes, ears, hands and feet. Should you be not feeling well or are upset over something, this might be affected by your power to driver effectively.
If you wish to tow a trailer take that weight note also. The trailer tongue (hitch) weight probably will not put the18 wheeler over it's rated axle capacities for front and rear too as mixed up. Your truck likewise have a Gross Combined Weight Rating, which could be the total weight of truck, all cargo and all towed all together ..
Before you place out to order you truck train horns to install in an individual work garbage compactor truck for sale car, check your local ordinances to acquiring that it is allowed. If it is legal to own a train horn, then may to be able to consider the dB sums of the horn and dimension of the horn this also suit your truck biggest. Standard train horns produce about 170dB of sound.
After all, hard effort?