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Ministry of Transport, Public Works and Water Management

Explore new developments in life-cycle cost analysis of civil infrastructure presented by Leo Klatter. Topics covered include national water and road network systems in the Netherlands, asset management challenges, and strategies for optimizing maintenance and replacement costs.

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Ministry of Transport, Public Works and Water Management

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  1. Ministry of Transport, Public Works and Water Management

  2. New Developments in Life-Cycle Cost Analysis of Civil Infrastructure Leo Klatter August 20th 2003

  3. Presentation Outline • National Water and Road Network • Life-Cycle Based Asset Management • Case Study Main Road Network • Conclusions

  4. National Water Systems the Netherlands • 724 km canals • 828 km navigable rivers • 63.360 km2 water area • Object categories • Canal, river beds • Dikes, embankments • Structures • Water • Facilities

  5. Structures in NL Water Systems

  6. Age Distribution Structures

  7. Main Road Network the Netherlands • 3200 km road, of which 2300 km motorway • Object categories • pavements • structures • traffic facilities • environmental assets

  8. Structures in NL Road Network

  9. Replacement Value – Year of Construction

  10. Management Challenges • Ageing structures • Maintenance cost increase • Rehabilitation and improvement necessary • Replacement comes in sight • User demands increase • Limited resources • Accountability and efficiency

  11. Life-Cycle Based Asset Management USA Federal Highways Administration (FHWA) • Customer satisfaction and return on investment • Comprehensive; all asset classes of network • Record value long-lived infrastructure • Asset management; Life-Cycle Costing in broader context

  12. Engineering Economics Business Practices Asset Management System Performance: Engineering – Cost-Efficient and Effective Economics – Optimal Resource Allocation Business Practices -Process Improvement

  13. Engineering Design • Safety, reliability; design life time • Load < > strength Construction quality • Materials Preservation • Maintenance strategy • Condition

  14. Economics Life-cycle cost analysis • Maintenance • Replacement • User cost Optimisation Return on investments Financial strategies

  15. Business Practices Determines costs and performance to high extend! • Strategic planning • Operational planning • Inspections • Prioritization • Data systems => Reliable models are essential tools

  16. Case Main Road Network • Maintenance cost • Strategic plan • Operational programs • Replacement

  17. Bridge deck / Pavement Joint Main carrying element Guard rail Guard rail Railing bearing Abutment Pier Bridge Elements

  18. Data for a Typical Bridge (< 200 m)

  19. Maintenance Strategy of Elements • Functional demands • Deterioration process • Measures • Type / extend • Intervals • Cost • Inspections

  20. Maintenance Costs of a Typical Bridge Annual cost 14 €/m2

  21. Annual Maintenance Cost (Network)

  22. Breakdown of Road Management Costs(variable)

  23. Strategic Document Needed Transparent budget estimate forms start of discussion

  24. Strategic Document 10-page management summary Content: • Structure stock and its functionality • Maintenance strategy • Basic maintenance level • Options • Program and budget

  25. Basic Maintenance Level Quality level Trafficsafety Environmental quality Appearance User comfort Mobility minimum

  26. Operational practice • Life-cycle cost based on maintenance strategy for element types • Standard plan customised to individual bridge • Update with inspection results • Operational maintenance program

  27. End of service life Decomposition / maintenance plan Operational maintenance program Adjusting the maintenance plan Clustering and optimization Inspection Maintenanceexecution

  28. Strategic budget need Adjusting the maintenance plan Clustering and optimization Inspection End of service life Decomposition / maintenance plan Actual budgetneed Maintenanceexecution Position strategic document Road management Operational program Bridge management

  29. Annual Maintenance Budget (variable)

  30. “To replace or not to …..” Replace, rehabilitate or maintain Decision based on • Safety • Functionality • Economics • Available budgets

  31. Replacement cost M Euro Design Practice Year Forecasted Replacement Cost

  32. Research items • Integration of reliability and condition analysis using life-cycle cost approach => Beyond “living apart together” • Dealing with uncertainty in inspections => Modelling inspection strategy • Use of inspections for prediction => Matching strategy and reality • Modelling total life-cycle cost of structure stock => Merging maintenance and replacement

  33. Colophon Ministry of Transport, Public Works and Water Management Civil Engineering Division

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