Thar Coal field Open Pit Coal Mine is located at remote area of Pakistan, where no signal of any network is available so location of truck movement can be observed so that fleet management issues can be resolved.
The best way other than GPS IS (LPS)Local Positioning System.It will give coverage for our required area only.
My another suggestion is that you can try the detection of vehicles using the RFID tracking system. By placing the RFID tags in the trucks and placing the RFID detector in frequent intervals or along each row.By this we can get to identify that along which detector the vehicle get passed.