House:LEGISLATIVE ASSEMBLY- QUESTIONS ON NOTICE
Date:TUESDAY, 10 June 1997
Member:Warnock, Ms Diana; Omodei, Mr Paul
Subject:ROADS - MITCHELL FREEWAY
Page:3700 / 1

(22) If not, why not?

(23) Is it correct that any monitoring of traffic noise which does not include those days recognised as peak traffic days will invariably give a lower dB(A) L10(18hours) reading than if peak traffic days were included?

(24) If not, why not?

(25) What are the results of the most recent monitoring of traffic noise from the Mitchell Freeway in Mt Hawthorn between Britannia and Scarborough Beach Roads?

(26) On what dates and days was this monitoring undertaken?

(28) From what location/s was this monitoring undertaken?

(29) Was this monitoring undertaken from the residential location closest to the Freeway in Mt Hawthorn between Britannia and Scarborough Beach Roads?

(30) If not, why not?

(31) Can the Minister confirm that monitored noise levels on wet days would generally be expected to be higher than on dry days?

(32) If so, can the Minister give the dates on which monitoring of traffic noise in Mt Hawthorn between Britannia and Scarborough Beach Roads was carried out in wet weather?

(33) Is it correct that noise monitoring undertaken exclusively during dry or wet weather would be expected to give an unrepresentative dB(A) L10(18hours) measurement of the traffic noise encountered throughout the year?

(34) If not, why not?

(35) Is it correct that in order to properly assess the claims of unreasonable noise from traffic, on the Mitchell Freeway, monitoring should be undertaken throughout the year in all weather conditions to determine the average dB(A) L10 (18hour) measurements?

(36) If not, why not?

(37) Are existing guidelines for traffic noise inadequate in providing the necessary impetus for noise abatement action in response to the petitioned concerns of residents?

(38) If not, why not?

Mr OMODEI replied:

The Minister for Transport has provided the following reply -

(1) Yes.

(2) Not applicable.

(3) Yes. However, noise levels are not predicted to exceed noise level standards.

(4) Not applicable.

(5) Noise was monitored at residences in Leederville, Mt Hawthorn and Glendalough prior to construction of the northbound carriageways on Mitchell Freeway.
    (6) Yes.

    (7) Not applicable.

    (8) Yes.

    (9) Recent advice to Main Roads Western Australia from the New South Wales Road Traffic Authority (NSWRTA) is that the standard the member quotes is not the standard it is working to.

    (10) Advice from the NSWRTA is that the standard to which the member refers is not quoted correctly. The 63dB(A) L10 (18 hour) standard applies to new roads and upgrades to existing roads. In this context it is the same as Main Roads' current standard. NSWRTA indicated it is now using a Leq standard in the same fashion and that it does not have a standard in force for remediation work on the existing network where