la
Mae
of friction
cause to reduce traffic noise
Question No.10
Written Reply by the Hon. Michael Leung, J.P., Secretary for Transport
to a question by the Hon. Poon Chi Fai in the Legislative Council on 6 July 1988
10. MR. POON CHI-FAI asked:
Question: In relation to the overlay of "friction
course" on certain sections of the Island Eastern Corridor to reduce noise generated from vehicles using this roadway, will Government inform this Council:
(a) whether there is any significant
(b)
reduction in the noise level after the overlay of friction course; and
whether there is any plan to overlay the material on other roads and, if so, what criteria will be used to determine which roads are to be overlaid?
SECRETARY FOR TRANSPORT:
Sir
Results of several noise surveys conducted by the Environmental Protection Department show that the friction
course laid on a 300 metre section of the Island Eastern
m
Corridor has reduced the noise generated by road vehicles
five
by an average of decibels. This is considered
significant because to achieve this reduction the traffic
flow on the Island Eastern Corridor would have to be
per cent
reduced to about 308 of its current flow.
97 2.
The use of this bituminous friction course was
developed by Highways Department mainly to improve skid
resistance and was used originally on the New Territories
Circular Road where traffic was expected to travel at
higher speeds.
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