noise pollution

I believe the following websites could help you.

Noise Pollution in Hong Kong(in GovHK)
http://www.gov.hk/en/residents/environment/noise/noisepollutioninhk.htm

AN OVERVIEW ON NOISE POLLUTION AND CONTROL IN HONG KONG
http://www.epd.gov.hk/epd/english/environmentinhk/noise/noise_maincontent.html

Planning to Tackle Noise Problem
http://www.epd.gov.hk/epd/noise_education/web/ENG_EPD_HTML/m3/ordinance_4.html

Here is a quotion from the 3rd web

The Government has been taken a more active environmental participation in the land-use and infrastructure planning process since the mid-eighties to pre-empt noise problems. For example, proponent of new roads are required to go through the Environmental Impact Assessment process to ensure that existing and planned noise sensitive receivers such as residential dwelling and schools are protected from excessive traffic noise. This requirement has become statutory when the Environmental Impact Assessment Ordinance commenced in April 1998. Further, every opportunity for noise improvement during urban re-development will be seized so as to improve the noise environment through environmental friendly urban design.