2. Traffic Noise

In 2006, the average equivalent sound level for the regional ambient noise was 72.0dB(A) in the day time,the same as that of 2005. And it was 64.9dB(A), 0.9dB(A) lower than that in 2005. The average traffic flow during day and night time on the arterial roads was 2144 vehicles/hour and 1000 vehicles/hour, 16 vehicles/hour more in the day time and 94 vehicles/hour less at night than those in 2005.

The monitoring data of recent five years (2002-2006) indicated that the traffic noise failed to meet the corresponding functional requirements in all the other four years except in the year of 2002. The level of traffic noise showed an up trend from 2002 to 2004 and remained stable from 2004 to 2006.