❓ A WA parliamentary question addresses noise concerns following upgrades to the Great Northern Highway in the Swan Valley. The response details the road's elevation changes, noise impact assessments, and noise abatement measures implemented for affected residents, except for one property owner who declined the offer.
AnsweredQoN 2504Legislative Council
QuestionView source ↗
I refer to the most recent upgrade of the Great Northern Highway, through the Swan Valley, and ask -
(1) Has the road been raised as a result of this work?
(2) If yes to (1), what has the increase in height been?
(3) Has the Department measured the traffic noise affecting residents prior to, and after the road works?
(4) Will measures for noise abatement on this section of road be undertaken?
(5) If yes to (4), -
(a) what form will those measures take; and
(b) when will they be implemented?
(1) Has the road been raised as a result of this work?
(2) If yes to (1), what has the increase in height been?
(3) Has the Department measured the traffic noise affecting residents prior to, and after the road works?
(4) Will measures for noise abatement on this section of road be undertaken?
(5) If yes to (4), -
(a) what form will those measures take; and
(b) when will they be implemented?
AnswerView source ↗
Answered
10 August 2010
Responded by
Minister for Transport
Response time
56 days
(1) The reconstructed highway has been raised, but only in some areas; in other areas it has been lowered.
(2) The increase in height has ranged from 0m to 1.325m. The increase has been necessary to ensure water flows along the highway and into the newly formed piped drainage system. It was also raised to avoid the high water table in some areas from adversely impacting on the life of the pavement, and in the vicinity of Susannah Brook, to remove the substantial dip in the road.
(3) A Noise Impact Assessment, which included noise measurements and modelling, was undertaken by consultants Lloyd Acoustics in March 2008. The noise was modelled for both 2011 and 2031, comparing the results of building the highway upgrade and comparing these results to those that would have resulted if the highway was not upgraded. The noise level was modelled at each individual residence, between the southern end of the works just north of Lennard Street and West Swan Road.
(4) Yes. The Noise Impact Assessment results have allowed Main Roads to determine a suitable noise management package to be offered to the adversely affected owners of residential properties. There are eight adversely affected residences, which were modelled to have a minor increase of between 0.6 dB and 1.2 dB in noise. The affected residences are at 677, 679, 693, 793, 835, 837, 867 and 893 Great Northern Highway. The remaining residences were modelled to have a minor reduction in noise levels, given the smoother running asphalt surface that has been used for the upgrade.
(5)
(a) The measures have involved improvements to residential buildings in the form of ceiling insulation (if none was present), evaporative air conditioning (to maintain air flow), thickened glass windows (to reduce noise penetration), and solid core doors (to reduce noise penetration).
(b) The measures have recently been completed, in a manner generally agreed with the individual owners. However, Mr B M Stanich (Keystone Asset Pty Ltd), who owns land at 837 Great Northern Highway has declined the package for his tenanted house on that parcel of land.
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(2) The increase in height has ranged from 0m to 1.325m. The increase has been necessary to ensure water flows along the highway and into the newly formed piped drainage system. It was also raised to avoid the high water table in some areas from adversely impacting on the life of the pavement, and in the vicinity of Susannah Brook, to remove the substantial dip in the road.
(3) A Noise Impact Assessment, which included noise measurements and modelling, was undertaken by consultants Lloyd Acoustics in March 2008. The noise was modelled for both 2011 and 2031, comparing the results of building the highway upgrade and comparing these results to those that would have resulted if the highway was not upgraded. The noise level was modelled at each individual residence, between the southern end of the works just north of Lennard Street and West Swan Road.
(4) Yes. The Noise Impact Assessment results have allowed Main Roads to determine a suitable noise management package to be offered to the adversely affected owners of residential properties. There are eight adversely affected residences, which were modelled to have a minor increase of between 0.6 dB and 1.2 dB in noise. The affected residences are at 677, 679, 693, 793, 835, 837, 867 and 893 Great Northern Highway. The remaining residences were modelled to have a minor reduction in noise levels, given the smoother running asphalt surface that has been used for the upgrade.
(5)
(a) The measures have involved improvements to residential buildings in the form of ceiling insulation (if none was present), evaporative air conditioning (to maintain air flow), thickened glass windows (to reduce noise penetration), and solid core doors (to reduce noise penetration).
(b) The measures have recently been completed, in a manner generally agreed with the individual owners. However, Mr B M Stanich (Keystone Asset Pty Ltd), who owns land at 837 Great Northern Highway has declined the package for his tenanted house on that parcel of land.
Notice: This document is created or edited using unregistered or evaluation copy of rtLib valid for testing or development purposes only. To use it for productive or any other purposes please register it. You may purchase the license on
http://www.rtlib.com
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