such measures aren't even necessary if the people possess self discipline.. but in order to address mass pop it becomes rather mandatory to have such deterrents to ward off unfortunate eventualities / accidents etc.
In Warminster, UK.. i once saw that on their main road to a famous super store (called OneStop) a man drove his car over a round about that was "painted" on the road as a hollow circle.. no one was there no camera nothing.. just me and another friend passing by.. He could have passed right over it ignoring it altogether as there were absolutely no other cars around it ...but to my surprise he displayed a piece of educated driving and i wondered if i could 've seen similar display in pak under the similar circumstances..
We need these speed cameras as they are for our own safety .. and personally i don't find any heroic acts in out speeding cops / police .. its sheer immaturity.. We should restrict to the speed limits not for anyone else but for ourselves.. (Y)