Why do policemen catch the people jumping the signal? Why can’t they stand on the junction so that no one jumps the signal ?

All over the world when one installs signals policemen are removed totally as people follow the signals themselves even at mid night. The scenario in our society is quite opposite. Red means stop, if the policeman is there; red means nothing if policeman is not there. This is a sad reflection on our value system. Ideally, we would like to remove these police-men from the signalized junctions and re-deploy them in the residential areas which are totally neglected. However, in the absence of self regulation this appears to be the distant dream. Traffic police catches people because they jump signals. Motorists should follow rules irrespective of presence and absence of police men. In the absence of sustainable attitudinal change, enforcement is the only deterrence against indiscipline on roads.