A WA parliamentary question seeks information on reports regarding the need for emergency lanes in the Northbridge Tunnel, both before and after its construction. The response indicates no specific reports existed, and a future reconfiguration to six lanes is possible due to increased traffic.

AnsweredQoN 4676Legislative Assembly
Asked
22 February 2011
Portfolio
Transport

QuestionView source ↗

In relation to the Northbridge Tunnel and the Department of Transport confirming it is examining expanding the Graham Farmer Freeway tunnel from two lanes to three in both directions, what reports and information were provided to the Department and Government prior to, and since construction, regarding the need for emergency lanes to be included?

AnswerView source ↗

Answered
21 March 2011
Responded by
Minister for Transport
Response time
27 days
Main Roads WA
advises:
The Northbridge Tunnel was designed and constructed with the intention of operating as a 6 lane (3 lanes in each direction) facility. At the time the Tunnel was opened, traffic volumes did not justify the use of 6 lanes so as an interim measure, the lane configuration was changed to 4 traffic lanes plus 2 lanes (2 traffic lanes plus 1 emergency lane in each direction).
The closure of Riverside Drive will result in increased patronage of the Tunnel, which may necessitate reconfiguration of the tunnel carriageways to accommodate the 6 lane option.
Main Roads has advised that there are no reports specifically seeking the inclusion of emergency lanes, either before construction or post-opening of the Tunnel.
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