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1 Ministry of Transport, Public Works and Water Management
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2 New Developments in Life-Cycle Cost Analysis of Civil Infrastructure Leo Klatter August 20th 2003
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3 Presentation Outline National Water and Road Network Life-Cycle Based Asset Management Case Study Main Road Network Conclusions
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4 National Water Systems the Netherlands 724 km canals 828 km navigable rivers 63.360 km 2 water area Object categories –Canal, river beds –Dikes, embankments –Structures –Water –Facilities
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5 Structures in NL Water Systems
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6 Age Distribution Structures
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7 Main Road Network the Netherlands 3200 km road, of which 2300 km motorway Object categories –pavements –structures –traffic facilities –environmental assets
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8 Structures in NL Road Network
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Replacement Value – Year of Construction
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10 Management Challenges Ageing structures –Maintenance cost increase –Rehabilitation and improvement necessary –Replacement comes in sight User demands increase Limited resources Accountability and efficiency
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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
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12 Asset Management System Performance: Engineering – Cost-Efficient and Effective Economics – Optimal Resource Allocation Business Practices -Process Improvement Business Practices Engineering Economics
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13 Engineering Design Safety, reliability; design life time Load strength Construction quality Materials Preservation Maintenance strategy Condition
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14 Economics Life-cycle cost analysis Maintenance Replacement User cost Optimisation Return on investments Financial strategies
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15 Business Practices Determines costs and performance to high extend! Strategic planning Operational planning –Inspections –Prioritization Data systems => Reliable models are essential tools
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16 Case Main Road Network Maintenance cost Strategic plan Operational programs Replacement
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17 Bridge Elements Joint Bridge deck / Pavement Main carrying element bearing Guard rail Railing Abutmen t Pier Guard rail
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18 Data for a Typical Bridge (< 200 m) Bridge data Width Length Deck area Replacement value Lifetime 16 m 54 m 864 m 2 1.7 * 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 €
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19 Maintenance Strategy of Elements Functional demands Deterioration process Measures –Type / extend –Intervals –Cost Inspections
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Maintenance Costs of a Typical Bridge Annual cost 14 €/m2
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21 Annual Maintenance Cost (Network)
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22 Breakdown of Road Management Costs (variable)
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23 Strategic Document Needed Transparent budget estimate forms start of discussion
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24 Strategic Document 10-page management summary Content: –Structure stock and its functionality –Maintenance strategy –Basic maintenance level –Options –Program and budget
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25 Basic Maintenance Level Traffic safety Environmentalquality User comfort Appearance Mobility Quality level minimum
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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
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27 Operational maintenance program Maintenance execution Adjusting the maintenance plan Inspection Clustering and optimization Decomposition / maintenance plan End of service life
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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
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29 Annual Maintenance Budget (variable)
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30 “To replace or not to …..” Replace, rehabilitate or maintain Decision based on Safety Functionality Economics Available budgets
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Forecasted Replacement Cost Design Practice Replacement cost M Euro Year
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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
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Colophon Ministry of Transport, Public Works and Water Management Civil Engineering Division
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