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 km 2 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

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

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 Elements Joint Bridge deck / Pavement Main carrying element bearing Guard rail Railing Abutmen t Pier Guard rail

18 Data for a Typical Bridge (< 200 m) Bridge data Width Length Deck area Replacement value Lifetime 16 m 54 m 864 m * 10 6 € 68 years Replacement cost elements (exchangeable elements) Pavement Joints Bearings Guard rail Railing 39,000 € 44,000 € 145,000 € 14,000 € 6,000 € Total248,000 €

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

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 Traffic safety Environmentalquality User comfort Appearance Mobility Quality level 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 Operational maintenance program Maintenance execution Adjusting the maintenance plan Inspection Clustering and optimization Decomposition / maintenance plan End of service life

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

29 Annual Maintenance Budget (variable)

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

Forecasted Replacement Cost Design Practice Replacement cost M Euro Year

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

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