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Parliamentary Questions

Question Without Notice No. 682 asked in the Legislative Council on 24 June 2020 by Hon Jacqui Boydell

Minister responding: Hon R. Saffioti
Parliament: 40 Session: 1

Answered on


682. Hon JACQUI BOYDELL to the minister representing the Minister for Transport:

I ask this question on behalf of Hon Colin Holt.

I refer to the current road surface and noise mitigation issues currently experienced with the NorthLink WA project and the Bunbury Outer Ring Road.

(1) Given the high level of road usage by heavy vehicles, what type of road surface is planned for this project?

(2) What plans are in place to mitigate movement of chip stones and damage to vehicles, especially if chip seal is used as the surface material?

(3) What individual plans are in place on site to monitor sound levels across the northern, central and southern sections of the Bunbury Outer Ring Road?

(4) Will sound be monitored prior to construction commencing at each site?


I thank Hon Colin Holt for some notice of the question. The following information has been provided by the Minister for Transport.

It is noted that the contract for NorthLink stage 3 was signed in January 2017 under the former Liberal–National government, and the decision to use the chip seal method was contained within this contract. It is also noted that a number of high-volume roads have a chip seal treatment, including sections of Roe Highway, Tonkin Highway, Brookton Highway and Wanneroo Road.

(1)–(2) Details such as the road seal and noise mitigation will be determined as part of ongoing contract negotiations.

(3) Noise monitoring will be undertaken soon after the road opens to validate noise modelling and demonstrate that the requirements of state planning policy 5.4 have been achieved.

(4) Noise monitoring has occurred.