There are numerous road blocks in the city which slow down traffic and cause huge traffic jams, but which are not manned by any human beings! So why are they there?
The one I see most often is the one at the airport just as you come out of the Terminal 1A. 4 lanes of traffic has to slow down to squeeze through the road block one vehicle at a time. While the cops who are supposed to be checking the cars are presumably having tea somewhere.
Of course, everyone has often wondered what they are checking for anyway. But we'll talk about that another day. For now, I just wish that the cops would open up the roads at least when they are not on duty there.