the explanation is simple. how does a consumer get to challenge the challan in the first place? the machines are controlled by the expressway operators. this kind of automation is exactly the thing people are scared off with aadhaar and other biometric systems. how would you feel if the government makes it mandatory for gps devices to be installed on all cars to automate the entire system of issuing speeding challans? speed anywhere and the gps would make sure that it is recorded in government centers and challans are issued on the basis of that?