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Engineers Australia September 2010 Dave Thomas, Project Director, Main Roads Graeme Nicholls, A/Manager Project Services, ...
Project Overview  <ul><li>Project Objectives </li></ul><ul><li>Major access into Mandurah via freeway </li></ul><ul><li>Re...
Project Overview  <ul><li>6.5 kilometres dual carriageway -  asphalt surface </li></ul><ul><li>$155 million project – join...
Project Overview  <ul><li>700,000 cubic metres of material </li></ul><ul><li>140,000 square metres of base course </li></u...
<ul><li>222 metre new rail tunnel </li></ul><ul><li>7.5m high </li></ul><ul><li>220 pre-cast segments </li></ul><ul><li>15...
<ul><li>170 metre extension of the existing tunnel  </li></ul><ul><li>7.5 high </li></ul><ul><li>144 pre-cast segments </l...
Tunnel Installation - video
Project Overview - Walls  <ul><li>3.5 km of MSE retaining wall – 3575 panels, each measuring 4 square metres </li></ul><ul...
Intelligent Transport Systems  <ul><li>6.1km  of Fibre Optic Cable </li></ul><ul><li>2 x  Closed Circuit Television (CCTV)...
Public Art - sculptures Scoop <ul><li>Grand entry statement / visual identity </li></ul><ul><li>Express local themes </li>...
Public Art - sculptures
Legacy Project – Marlee Reserve <ul><li>SGA worked with the City of Mandurah and Friends of Marlee Reserve to construct a ...
Vision Zero Development and application of sustainable solutions that can reliably prevent death and serious injury, in sp...
Safe System Advisory Group <ul><li>Formed as part of NPBH project </li></ul><ul><li>Adopted for MER </li></ul><ul><li>Repr...
Vision Zero <ul><li>Development of Key Performance Indicators </li></ul><ul><li>Based on 3 hierarchy levels of control </l...
Vision Zero
Vision Zero
Original concept - 4 way intersection <ul><li>Mandurah Road signalised </li></ul><ul><li>Unusually wide median </li></ul><...
Roundabout Option <ul><li>Could be a safe system </li></ul><ul><li>Issues with traffic capacity </li></ul><ul><li>Due to h...
Roundabout Option <ul><li>SIDRA Analysis </li></ul><ul><li>Calibrated the model </li></ul><ul><li>New version of SIDRA </l...
Double right turn
Eastern States Example
Roundabout – 4 Way
Roundabout – approaches
Roundabout - Final <ul><li>Project scope was modified to include a roundabout at southern tie in to improve road safety </...
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Southern Gateway Alliance - Mandurah Entrance Road

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  • Aka Safe Systems Introduced to Main Roads and SGA on NPBH and carried forward to MER Definition Always tried to be safe Break down – death and serious injury - human fallibility – “cant stop idiots from killing themselves” – lets stop assuming that. Inherent safeness – can’t hurt if you tried.
  • Met with designers fortnightly. Job was to guide design team and challenge us.
  • Suggested by SSAG Simple measurement to track improvements to the design 3 hierarchy levels: Hierarchy level 1, Sustainably Safe Road and roadside design features that prevent the possibility of serious injury and death. Can be thought of as methods to eliminate, substitute or protect the hazard. Examples are: At conflict points avoidance of right angle crossings in favour of acute angles, combined with speed limiting features; Flexible barriers on roadsides and medians; Pedestrians crossing where speeds are reduced by the road design. Hierarchy level 2, Real Time Intervention Reliable warning or intervention systems that detect high risk conditions and provide specific warnings to the road user (eg. ITS, Traffic Signals, Audio Tactile Edge Lines). This may be thought of as methods to provide engineering control of the hazard.   Hierarchy level 3, Regulate/ Control Warning, guidance, educational and regulatory/enforcement measures are applied to mitigate remaining risks. These rely on the vehicle driver. This is a “business as usual” solution.
  • NN now 57 Mandurah Road is 12
  • Obvious that the feature most lacking in Safe Systems principles was intersection. High approach speeds. Likely to have the normal incidence of serious right angle crashes.
  • SSAG recommended investigating roundabout. Simple assessments of capacity – won’t work Need double right turn – not allowed Andrew O’Brien from Victoria Owen Arndt from Qld
  • “ Sidra not reliable with roundabouts.” Video survey of another two lane roundabout with similar mix of vehicle types to calibrate SIDRA.
  • All retrofits Lines not visible in certain conditions Concern that it might create more confusion.
  • Flat portion Free slips with straights.
  • High approach speeds Artwork Chicane Clear runouts Narrowed cross section
  • Exchequer kerbed off NN now 57 – between outstanding and best practice Mandurah Road is 12 – between poor and failure
  • Transcript of "Southern Gateway Alliance - Mandurah Entrance Road "

    1. 1. Engineers Australia September 2010 Dave Thomas, Project Director, Main Roads Graeme Nicholls, A/Manager Project Services, Main Roads
    2. 2. Project Overview <ul><li>Project Objectives </li></ul><ul><li>Major access into Mandurah via freeway </li></ul><ul><li>Reduce travel time by at least 5 minutes </li></ul><ul><li>Future Mandurah Road bypass, when Road B connected. </li></ul>
    3. 3. Project Overview <ul><li>6.5 kilometres dual carriageway - asphalt surface </li></ul><ul><li>$155 million project – jointly funded by the State & Federal Govt </li></ul><ul><li>Being delivered using an Alliance contract </li></ul><ul><ul><li>Leighton Contractors </li></ul></ul><ul><ul><li>GHD </li></ul></ul><ul><ul><li>WA Limestone </li></ul></ul><ul><ul><li>Main Roads </li></ul></ul><ul><li>Construction commenced September 2009 </li></ul><ul><li>Contract completion originally scheduled for December 2010, but now expected to open in October 2010 </li></ul><ul><li>Expected to be used by 10,000 vpd </li></ul>
    4. 4. Project Overview <ul><li>700,000 cubic metres of material </li></ul><ul><li>140,000 square metres of base course </li></ul><ul><li>170,000 square metres of asphalt / seal </li></ul><ul><li>9 kilometres of drainage pipe </li></ul><ul><li>28,000 cubic metres of topsoil </li></ul>
    5. 5. <ul><li>222 metre new rail tunnel </li></ul><ul><li>7.5m high </li></ul><ul><li>220 pre-cast segments </li></ul><ul><li>15 headwall panels </li></ul><ul><li>Tunnel placed using 2 x 280 tonne crawlers </li></ul><ul><li>Completed in 3 x 56hr round the clock rail shutdown, no incidents </li></ul>Project Overview – Parklands Tunnel
    6. 6. <ul><li>170 metre extension of the existing tunnel </li></ul><ul><li>7.5 high </li></ul><ul><li>144 pre-cast segments </li></ul><ul><li>4 headwall panels </li></ul><ul><li>Tunnel placed using 2 x 280 tonne crawlers, 1 x 500 tonne mobile </li></ul><ul><li>Completed in 2 x 56hr round the clock rail shutdown, no incidents </li></ul>Project Overview – Mandurah Tunnel
    7. 7. Tunnel Installation - video
    8. 8. Project Overview - Walls <ul><li>3.5 km of MSE retaining wall – 3575 panels, each measuring 4 square metres </li></ul><ul><li>Approx 2 km of limestone noise walls </li></ul>
    9. 9. Intelligent Transport Systems <ul><li>6.1km of Fibre Optic Cable </li></ul><ul><li>2 x Closed Circuit Television (CCTV) cameras </li></ul><ul><li>5 x Highway Emergency Phone System (HEPS) </li></ul><ul><li>4 x Vehicle Detection Systems (VDS), comprising of 23 zones </li></ul><ul><li>1 x Variable Speed School Signs (VSS) </li></ul><ul><li>2 x Variable Message Signs (VMS) </li></ul>
    10. 10. Public Art - sculptures Scoop <ul><li>Grand entry statement / visual identity </li></ul><ul><li>Express local themes </li></ul><ul><li>Improve way finding and road safety </li></ul>
    11. 11. Public Art - sculptures
    12. 12. Legacy Project – Marlee Reserve <ul><li>SGA worked with the City of Mandurah and Friends of Marlee Reserve to construct a boardwalk and trail network through the Reserve for local community use </li></ul><ul><li>SGA also installed 9 artificial cockatoo nesting boxes </li></ul><ul><li>Other environmental initiatives </li></ul><ul><li>Project site = 30 hectares of land was rehabilitated using 100,000 native seedlings and 130 kgs of native seed </li></ul><ul><li>Approx 7 kms of fauna fencing </li></ul>
    13. 13. Vision Zero Development and application of sustainable solutions that can reliably prevent death and serious injury, in spite of human fallibility and provide inherent safeness of the road”
    14. 14. Safe System Advisory Group <ul><li>Formed as part of NPBH project </li></ul><ul><li>Adopted for MER </li></ul><ul><li>Representation from: </li></ul><ul><ul><li>City of Mandurah </li></ul></ul><ul><ul><li>Main Roads </li></ul></ul><ul><ul><li>ORS </li></ul></ul><ul><ul><li>Independent Chairman (Sarkis Petrossian) </li></ul></ul>
    15. 15. Vision Zero <ul><li>Development of Key Performance Indicators </li></ul><ul><li>Based on 3 hierarchy levels of control </li></ul><ul><li>1. Sustainably Safe </li></ul><ul><li>2. Real time intervention </li></ul><ul><li>3. Regulate / Control </li></ul><ul><li>Represented by ‘Nicholls Number’ </li></ul>
    16. 16. Vision Zero
    17. 17. Vision Zero
    18. 18. Original concept - 4 way intersection <ul><li>Mandurah Road signalised </li></ul><ul><li>Unusually wide median </li></ul><ul><li>Not sustainably safe </li></ul><ul><li>BAU approach </li></ul>
    19. 19. Roundabout Option <ul><li>Could be a safe system </li></ul><ul><li>Issues with traffic capacity </li></ul><ul><li>Due to high volumes from Mandurah Road west to south </li></ul><ul><li>Needs double right turn </li></ul><ul><li>Research </li></ul><ul><li>Researched best practice from other parts of the world </li></ul><ul><ul><li>USA </li></ul></ul><ul><ul><li>Europe </li></ul></ul><ul><ul><li>Eastern States </li></ul></ul><ul><li>Consulted with national experts </li></ul>
    20. 20. Roundabout Option <ul><li>SIDRA Analysis </li></ul><ul><li>Calibrated the model </li></ul><ul><li>New version of SIDRA </li></ul><ul><li>Sensitivity analysis of traffic volumes </li></ul><ul><li>Double Turn Requested </li></ul><ul><li>Not yet implemented in WA </li></ul><ul><li>Concern about driver behaviour </li></ul>
    21. 21. Double right turn
    22. 22. Eastern States Example
    23. 23. Roundabout – 4 Way
    24. 24. Roundabout – approaches
    25. 25. Roundabout - Final <ul><li>Project scope was modified to include a roundabout at southern tie in to improve road safety </li></ul><ul><li>Will initially be constructed as 3 leg with Exchequer Ave to be extended by the City of Mandurah in the future </li></ul>
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