❓ A WA parliamentary question regarding speed limits on the Kwinana Freeway between Perth and Bunbury, specifically concerning Lakes Road and Thomas Road. The answer provides justification for the speed limits based on traffic volumes and road design.
AnsweredQoN 3229Legislative Council
QuestionView source ↗
(1) On what basis was it determined that the speed limit would change at Lakes Road, on the highway that connects Perth to Bunbury?
(2) Has the Government considered to changing the speed limit to 110km per hour at Thomas Road?
(3) At what point between Lakes and Thomas Roads are traffic counters located, and what is the volume of traffic at each of these points?
(2) Has the Government considered to changing the speed limit to 110km per hour at Thomas Road?
(3) At what point between Lakes and Thomas Roads are traffic counters located, and what is the volume of traffic at each of these points?
AnswerView source ↗
Answered
15 February 2011
Responded by
Minister for Transport
Response time
82 days
(1) Prior to the recent opening of Mandjoogoordap Drive, Lakes Road was the key route into Mandurah for motorists travelling south on Kwinana Freeway. The speed limits for the Kwinana Freeway extension were based on the fact that traffic volumes reduce considerably south of the Lakes Road exit. As a consequence, the section south of Lakes Road was speed zoned at 110 km/h.
(2) Speed limits are continually monitored by Main Roads to ensure that they remain appropriate. The recent opening of Mandjoogoordap Drive substantially reduced vehicle volumes on Kwinana Freeway south of this interchange. As a result, the
110 km/h speed zone near Lakes Road was extended on 14 January 2011 to just south of Mandjoogoordap Drive.
As vehicle volumes increase by almost 50% north of Mandjoogoordap Drive and the distance between on and off ramps reduce north of Safety Bay Road the current speed limit of 100 km/h is deemed appropriate.
(3) Kwinana Freeway vehicles volumes:
North of Thomas Road = 32 400 Northbound and 32 600 Southbound
North of Karnup Road = 22 800 Northbound and 22 200 Southbound
North of Mandjoogoordap Drive = 13 900 Northbound and 22 200 Southbound
North of Lakes Road = 10 000 Northbound and 10 300 Southbound
Figures are average weekday traffic, not seasonally adjusted.
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(2) Speed limits are continually monitored by Main Roads to ensure that they remain appropriate. The recent opening of Mandjoogoordap Drive substantially reduced vehicle volumes on Kwinana Freeway south of this interchange. As a result, the
110 km/h speed zone near Lakes Road was extended on 14 January 2011 to just south of Mandjoogoordap Drive.
As vehicle volumes increase by almost 50% north of Mandjoogoordap Drive and the distance between on and off ramps reduce north of Safety Bay Road the current speed limit of 100 km/h is deemed appropriate.
(3) Kwinana Freeway vehicles volumes:
North of Thomas Road = 32 400 Northbound and 32 600 Southbound
North of Karnup Road = 22 800 Northbound and 22 200 Southbound
North of Mandjoogoordap Drive = 13 900 Northbound and 22 200 Southbound
North of Lakes Road = 10 000 Northbound and 10 300 Southbound
Figures are average weekday traffic, not seasonally adjusted.
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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