My Nissan 4 door pickup is 24 years old, has done over 380,000 km , serviced every year, does not blow smoke and you can still read the number plate ! The dumper trucks with their dustbin sized exhausts blowing clouds are waved through police checkpoints. Pickups that have been in accidents and still not been repaired, ie lights missing , no number plates and blowing smoke are all waved through. Not forgetting the 2 year old cars with their number plates sprayed over, are also waved through. Until the police do their job properly nothing will change......