Network Modelling. David Yeoell Assistant City Commissioner of Transportation

Transcription

1 Network Modelling David Yeoell Assistant City Commissioner of Transportation

2 We have (a duty) to maintain our highway network in a safe and reliable condition that meets the need of customers / users

3 Asset Management LA s - Increasing pressure to justify resources Even more important in the current financial crisis Need to demonstrate that best use of these resources is being made The adoption of good Asset Management will ensure that this challenge is met Asset Management is about doing things well and delivering the agreed service in the most cost effective and sustainable manner

4 Audit Commission Study Going the distance Councils must find a strategy to deliver road maintenance that balances growing service demands with reducing resources. Applying asset management principles will help councils to achieve value for money and resist expensive, short-term interventions

5 Asset Management Brings it all together: Data Policy and Strategy Customer Aspirations Future Demand The current situation for many authorities LIP and BSP Option Appraisal Supply Chain BVPIs Business Process Work Delivery IT Systems Whole Life Costs Maintenance Planning Value Management Financial Planning Risk Management Asset Management

6 Asset Management Top to Bottom: WHERE we are going, & WHY? WHAT is worth doing, & WHEN? STRATEGIC TACTICAL Asset Management provides the essential link HOW to do the right things? OPERATIONAL

7 The Introduction of a Transport Asset Management Plan (TAMP) facilitates the change of our approach to Business Planning to: Outcomes KPI s Activity Resource What we want to achieve? How will we measure? What is the most appropriate activity to achieve this? What is the most efficient / appropriate use of resources for this outcome? Resources are calculated using life cycle planning in line with ZBB to meet agreed Level of Service and Government Targets

8 What Level of Service is appropriate? Political Decision - Individual authorities Vision Need a baseline (where we are today) and a Target (where we want to be) and a Timescale for when we want to get to our target Gap Analysis To ascertain funding requirements and gaps Tools/Models are needed to determine expenditure needs and strategy to set the timeframe for meeting targets

9 Lifecycle Planning Our highway assets deteriorate we need to understand this and plan accordingly Condition after Initial Condition Maintenance Deterioration Maintenance Condition after Deterioration

10 Lifecycle Planning A lifecycle plan is a long term strategy for managing an asset, or group of similar assets, with the aim of providing the required performance while minimising whole life costs A lifecycle plan should give the optimal mix of inspection, testing, monitoring, maintenance, renewal and enhancement works that minimises the whole life costs and meets the service requirements Lifecycle plans are fundamental for Zero Based Budgeting Operation & Maintenance Asset Renewal or Replacement Asset Lifecycle Asset Disposal Asset Creation Operation & Maintenance

11 Producing Lifecycle Plans Good Pavement Performance Curve Con ndition Maintenance Intervention Threshold Rehabilitation Poor Time (years) or Traffic Loading

12 Producing Lifecycle Plans Time-based Preventative Maintenance Condition-based Preventative Maintenance Performance e Measure Operational Threshold Do Minimum & Service Restrictions Corrective Maintenance Time (years)

13 Determining funding requirements to meet agreed Service Levels Life Cycle Plans Provide the long-term strategy for maintaining an asset with the aim of providing the required Level of Service while minimising whole life costs Provide the robust justification for expenditure that meet the requirements of Zero Based Budgeting for both Revenue and Capital

14 Producing Lifecycle Plans Standard format Expenditure Type Maintenance Type Maintenance Activity Timing Quantity Revenue Capital Inspection and Testing Routine Reactive Programmed Improvement Description of maintenance activities for each maintenance type Description of the timing of each maintenance activity, e.g. weekly, monthly, annually etc. Description of the quantities associated with each maintenance activity, e.g. km of road, number of structures etc

15 Life Cycle Plans for each asset type

16 % of Network 50% 45% 40% 35% 30% 25% 20% 15% 10% 5% 0% Excellent % % % % % Footway Condition Good % % % % % Fair % % % % % Poor % % % % % % of Network 100% 95% 90% 85% 80% 0.54% 0.48% 0.40% 0.32% 0.16% 1.73% 2.18% 1.46% 1.74% 0.56% 10.81% 13.26% 12.00% 16.46% 15.56% 88.47% 84.88% 85.94% 81.27% 81.78% Poor Fair Good Excellent CI=0 CI=0-4 CI=5-9 CI=10-14 CI=15-19 CI=20-24 CI=25-29 CI=30-34 CI=35-39 Condition Index CI=40-44 CI=45-49 CI= CI=55-59 CI=60-64 CI= % Year % of Network 50% 45% 40% 35% 30% 25% 20% 15% 10% Carriageway Condition Excellent Good Fair Poor % % % % % % % % % % % % % % % % % % % % % of Network 100% 95% 90% 85% 80% 75% 70% 65% 2.18% 5.43% 2.45% 1.02% 1.33% 4.66% 7.10% 7.43% 10.57% 8.13% 8.36% 8.44% 10.27% 8.23% 8.20% 85.96% 82.01% 79.02% 80.97% 78.24% Poor Fair Good Excellent 5% 60% 0% CI=0 CI=0-4 CI=5-9 CI=10-14 CI=15-19 CI=20-24 CI=25-29 CI=30-34 CI=35-39 CI=40-44 CI=45-49 Condition Index CI=50-54 CI=55-59 CI=60-64 CI= CI=70-74 CI=75-79 CI=80-84 CI= % 50% Year Carriageway & Footway Condition Trends

17 Deterioration Modelling and Life Cycle Planning Tools for Footways and Carriageways: Work started early 2008 on the development of the methodology and computerised tools. These tools are used to support what-if analyses of different investment and/or maintenance strategies

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31 Annual Expenditure ( M) Annual Expenditure by Treatment and Defect Type Year Structural 1 Structural 2 Intermediate 1 Intermediate 2 Surface 1 Surface 2 CAT1 Defects CAT2 Defects

32 Annual Ex xpenditure ( M) Annual Expenditure by Treatment and Defect Type Year Structural 1 Structural 2 Intermediate 1 Intermediate 2 Surface 1 Surface 2 CAT1 Defects CAT2 Defects

33 Percent tage Area Condition Profile Over Time 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% Year Excellent Good Fair Poor Very Poor

34 HMEP Asset Management Working Group WP 6 Life Cycle Planning Toolkit Decision making tool at strategic level For use with or without detailed Condition Data. WP 11 Deterioration Modelling Guidance for use with the Life Cycle Planning toolkit Default deterioration curves? Work underway on these based upon the Atkins, Westminster and Transport for London models To be freely available to all LA s

35 Summary: LA s - increasing pressure to justify resources Good Asset Management can justify that the best use of these resources is met Life Cycle Planning provides a long term strategy for managing an asset, or group of similar assets, with the aim of providing the required performance while minimising whole life costs Deterioration Modelling and Life Cycle Planning tools are used to support what-if analyses of different investment and/or maintenance strategies The HMEP are working to provide LA s with the Network Modelling and Life Cycle Planning Tools to assist

36 Thank You Contact: Tel: