About one seventh of Hong Kong populations were once exposed to excessive road traffic noise levels due to inadequate considerations given in planning of roads and developments against potential noise problems in decades ago. While the number of affected people has been reducing progressively and significantly through proper noise planning and implementation of noise mitigation measures on existing roads in the past decades, the HKSAR Government still endeavors to address the noise problems of existing roads further. As only about some tens of existing road sections were found practicable for retrofitting barriers, it is considered more practicable to resurface more existing roads with suitable low noise road surfacing (LNRS) material to address the existing problem further. While polymer modified friction course has been found effective in reducing traffic noise and suitable for application on high speed roads, its applicability on local roads was uncertain. Hence, a series of studies have been conducting to evaluate the noise reduction performance and durability of different forms of LNRS materials, including polymer modified friction course, polymer modified stone mastic asphalt and rubberized asphalt, applied on local roads in Hong Kong. This paper presents the relevant findings available at present.
展开▼
