Southern Gateway Alliance - Mandurah Entrance Road

Engineers AustraliaSeptember 2010

Dave Thomas, Project Director, Main Roads

Graeme Nicholls, A/Manager Project Services, Main Roads

Project Overview

Project Objectives

• Major access into Mandurah via freeway

• Reduce travel time by at least 5 minutes

• Future Mandurah Road bypass, when Road B connected.

Project Overview

• 6.5 kilometres dual carriageway - asphalt surface

• $155 million project – jointly funded by the State & Federal Govt

• Being delivered using an Alliance contract Leighton Contractors GHD WA Limestone Main Roads

• Construction commenced September 2009

• Contract completion originally scheduled for December 2010, but now expected to open in October 2010

• Expected to be used by 10,000 vpd

Project Overview

• 700,000 cubic metres of material

• 140,000 square metres of base course

• 170,000 square metres of asphalt / seal

• 9 kilometres of drainage pipe

• 28,000 cubic metres of topsoil

• 222 metre new rail tunnel• 7.5m high• 220 pre-cast segments• 15 headwall panels• Tunnel placed using 2 x 280 tonne crawlers• Completed in 3 x 56hr round the clock rail

shutdown, no incidents

Project Overview – Parklands Tunnel

• 170 metre extension of the existing tunnel • 7.5 high• 144 pre-cast segments• 4 headwall panels• Tunnel placed using 2 x 280 tonne crawlers, 1 x 500 tonne mobile• Completed in 2 x 56hr round the clock rail shutdown, no incidents

Project Overview – Mandurah Tunnel

Tunnel Installation - video

Project Overview - Walls

• 3.5 km of MSE retaining wall – 3575 panels, each measuring 4 square metres

• Approx 2 km of limestone noise walls

Intelligent Transport Systems

• 6.1km of Fibre Optic Cable• 2 x Closed Circuit Television (CCTV) cameras• 5 x Highway Emergency Phone System (HEPS)• 4 x Vehicle Detection Systems (VDS),

comprising of 23 zones• 1 x Variable Speed School Signs (VSS)• 2 x Variable Message Signs (VMS)

Public Art - sculptures

Scoop

• Grand entry statement / visual identity• Express local themes• Improve way finding and road safety

Public Art - sculptures

Legacy Project – Marlee Reserve

• 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

• SGA also installed 9 artificial cockatoo nesting boxes

Other environmental initiatives

• Project site = 30 hectares of land was rehabilitated using 100,000 native seedlings and 130 kgs of native seed

• Approx 7 kms of fauna fencing

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”

Safe System Advisory Group

• Formed as part of NPBH project

• Adopted for MER

• Representation from: City of Mandurah Main Roads ORS Independent Chairman (Sarkis Petrossian)

Vision Zero

• Development of Key Performance Indicators

• Based on 3 hierarchy levels of control1. Sustainably Safe2. Real time intervention3. Regulate / Control

• Represented by ‘Nicholls Number’

Vision Zero

Vision Zero

Original concept - 4 way intersection

• Mandurah Road signalised

• Unusually wide median

• Not sustainably safe

• BAU approach

Roundabout Option

• Could be a safe system

• Issues with traffic capacity

• Due to high volumes from Mandurah Road west to south

• Needs double right turn

Research

• Researched best practice from other parts of the world USA Europe Eastern States

• Consulted with national experts

Roundabout Option

SIDRA Analysis

• Calibrated the model

• New version of SIDRA

• Sensitivity analysis of traffic volumes

Double Turn Requested

• Not yet implemented in WA

• Concern about driver behaviour

Double right turn

Eastern States Example

Roundabout – 4 Way

Roundabout – approaches

Roundabout - Final

• Project scope was modified to include a roundabout at southern tie in to improve road safety

• Will initially be constructed as 3 leg with Exchequer Ave to be extended by the City of Mandurah in the future