^^ to add to Anshuman's suggestion, register the car in permanent address, which would be the case for most of our address / ID proof (for Private owners only)
This is one way of closing the loop of corruption, which is rampant at RTO's across the country, if the vehicle owner is not the native of that particular city / state.
We are Indian citizen, not a specific state citizen. We need freedom of movement across the country, without being harassed for road tax and other related stuff, which vary from state to state
One car, one number across the Country - this should be the Motto.
Probably they could add an Entry Tax or something of that sort, but this should be done through the use of Technology (internet & website), wherein we make the payment online, take prints and go hassle-free
. Rather than the conventional way of stopping at Border RTO and loose valuable time waiting in Queue