THE points made by A. H. McKay's in his letter (South China Morning Post, July 14) are important to keep in mind. Some drivers are ignorant and careless on the road and do not observe speed limits, thus causing danger to other road users. However, it does not mean that the police should employ tricky means to catch them out. The force is a public establishment and the public would appreciate an honest and upright body. Besides the incident described by Mr McKay, the police sometimes set road blocks at expressway exits. Most of the expressways permit a maximum speed ranging from 80 km/h to 100 km/h. It is thus ridiculous to require drivers to lower their speed to just 50 km/h, the maximum limit at most exits, without allowing a ''grace distance''. People may suggest reducing speed before the exits but I have been stopped by a policeman on the Tolo Harbour Expressway and told to pick up speed because my car was running ''too slow''. The police may find it easy to issue tickets at these ''black and white'' areas and claim it is the Highways Department's fault for setting such limits, but the police should also exercise sound judgment to ensure that all roads are safe to drive on. Surely ensuring that road users continue their journeys with minimum delay should be a priority. MAGGIE LAM Wan Chai
