Constables are frequent targets of road ragers. Last month (April 5, 2000) a zonal officer who attempted to challan a driver for using a mobile phone while driving was dragged along clinging to the cars bonnet for several kilometres. Last June, a constable who tried to remove an unauthorisedly parked car was beaten up by the owners. In South Extension in November last year, constables who attempted to stop a vehicle were almost run over. And in March in the previous year, a woman ran over an assistant sub-inspector who tried to challan her for jumping a red light. In Sareens opinion, 70 per cent of all accidents are caused by human factors, which makes traffic psychology an important subject. In Germany, diagnostic interviews are conducted with drivers who hold responsible jobs.