I have been informed by my employer that they have received speeding fines for the tipper that I drive. I've recently been travelling to Port Kembla and back to Sydney in the morning and afternoon, so I was fined for speeding over the average speed between two points on Mt. Ousley. The tipper Tare is 3.4ton and gvm 7.4ton.The tipper had no load both ways. So I thought I could travel at 100kmh and 80kmh, not 40 down the Mt. Is there any chance of contesting this? I now have 8 fines.