Beyond Nerriga Route Options StudySEATS Meeting 7 November 2013 at Queanbeyan

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Presentation overview

Study purpose / background

Study area

Project objectives

Methodology

Route options

Progress to date

Preferred route selection

Traffic model

Next steps

Questions

Study purpose / background• Study’s prime aim is to identify a preferred route(s) for HML B-

Doubles across the escarpment from the NSW South Coast to the Monaro, Federal, Kings and/or Hume Hwy’s

• Total funding commitment of $300k - $200k from NSW Gov’t and $100k from five local councils (Goulburn-Mulwaree, Palerang, Shoalhaven City, Upper Lachlan Shire and Yass Valley)

• Managed by a Technical Committee - representatives RMS, TfNSW and the five local councils

• Project managed on behalf of SEATS by Steve Warrell

• Study programmed to be completed in 36 weeks – mid Nov 2013

RMS – 26.5m B-Double access

Study area

Generally, bounded by Hume Hwy to the west, Goulburn, MR92 Nerriga to Braidwood, Kings Hwy, Canberra and the Barton Hwy

Note - traffic network modelling is beyond the study area

Project Objectives

Determine a preferred route that, as a minimum:

• Improves freight productivity, efficiency and reliability of travel;

• Improves road safety;

• Can meet required design standards;

• Minimises the impact on the natural, cultural and built environment;

• Maximises the use of existing assets;

• Has the ability to be staged; and

• Provides value for money.

Methodology

• Project Review – previous studies

• Workshops with key stakeholders – heavy vehicle traffic demands (existing/future) within study area and beyond

• Request and receipt all traffic and crash data from Councils and Gov’t authorities

• Build GIS mapping to assist understanding of constraints and route selection• Heritage (AHIMS, Non-Indigenous)• State Forest / National Parks• Crash data• Topography• Other miscellaneous data

• Build a network traffic model – base model (calibrated) and predictive modelling for option assessment

Methodology cont’d

• Develop and confirm project objectives with TC

• Develop and confirm assessment criteria with TC (in line with project objectives)

• Build cost estimates for the 3 route options and staging options

• Selection of a preferred route with TC

• Draft Route Options Report

• Meet and present Draft Route Options Report

• Finalise Route Options Report

Route options

ARUP Study 1999 identified 5 key route options –

• Nowra – Nerriga – Tarago – Collector – Gunning

• Nowra – Nerriga – Tarago – ACT

• Nowra – Nerriga – Goulburn

• Nowra – Nerriga – Braidwood – Cooma

• Nowra – Nerriga – Braidwood - Bungendore - ACT

Route options cont’d

Current study considering 3 route options only –

1. Nerriga – Tarago – Collector – Gunning - Yass (green)

2. Nerriga – Braidwood – Bungendore – Murrumbateman – Yass (red)

and a combination of the above

3. Nerriga – Tarago – Bungendore - Murrumbateman – Yass (red/green)

Projective objective – ‘ability to be staged’

R

Progress to date

• Desktop review of previous studies completed

• Meetings with Councils and key stakeholders completed

• Undertake various reviews – environmental, geotechnical, alignment, drainage completed

• GIS model completed

• Cost estimates for route options and staging – near completion

• Network traffic model – near completion

• Meetings with TC in May, June and Sept

• Assessment of route options and selection of a preferred route – near completion

• Commenced draft route options report

Preferred route selection

Assessment of the 3 route options and selection of preferred route has commenced and near completion.

3 meetings with TC throughout this process -

• Project objectives confirmed

• Assessment criteria agreed and supporting data considered

• Ranking/weighting and scoring methodology agreed

• Staging of options considered

• Traffic network modelling presented and challenged

• Cost estimates presented and challenged

• Selection of a preferred route – subject to further investigation

Traffic Model

• Links based on GIS

• Speeds based on Google

• Route choice checked

• Demands from Matrix Estimation

Matrix Estimation

• Calibrated Network - 2012

• Prior demand matrix

• Matrix altered to match observed flows

• Separate matrices for light and heavy

Model Validation

Model Validation

Future demands

• 2036

• Freight Study

• Population Growth

• Updated trip ends

• New demand matrices

• Change in OD pairs

Change in Flows – Green Route

2036 – increase / decrease light/heavy 2036 – increase / decrease heavy

Change in Flows – Red Route

Change in Flows – Red / Green Route

• Finalise network modelling – 15 Nov

• Finalise cost estimates – 15 Nov

• Finalise scoring of assessment criteria and selection of preferred route – 22 Nov

• Complete draft report – submit to TC - 11 Dec

Next steps and timing

Questions

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