Sound pollution

In metropolitan Dhaka the pollution has taken an alarming dimension from an apparent beneficial measure implemented by the authorities. Large vehicles are not allowed to ply in the city during daytime. So heavy vehicles carrying goods move through the city during night causing enormous noise in the stillness. Construction materials are transported to building sites (mostly residential areas) and unloaded at night. Sound of moving vehicles, goods unloading and hollering of the workers pierce through the night making sleeping impossible for the unfortunate neighbours. Can builders/contractors take special permission for movement of their goods during daytime for such destinations? Or can the authorities restrict them to unload the cargo only after daybreak?

The authorities, apparently least care for noise pollution. The letter of Mr. Rahman tells about the effect of constant exposure to such pollution. I think there should be courses for educating the concerned officials about this menace. People in Dhaka city corporation areas do not even know the root of the term 'decibel', the unit for measuring sound, which they spell incorrectly on their roadside notices to warn the polluters. Quite understandably, nobody takes any notice of such careless warnings.