Network Strategic Evaluation Rodrigo Archondo-Callao Senior Highway Engineer, ETWTR

1. Network Strategic Evaluation Rodrigo Archondo-CallaoSenior Highway Engineer, ETWTR The World Bank

2. HDM-4 helps decisionmakers with strategic planning of investments or programming of road works HDM-4 evaluates the entire network managed by a road agency or a partial network of candidate roads typically in fair and poor condition Applications of HDM-4

3. define rational allocation of resources among networks, regions, and so forth calculate approximate quantities, costs, and benefits estimate outcomes in performance Strategic Planning Entire Network

4. Network Evaluation Options As a function of budget constraints: - Road works for each road and - Roads sorted by economic priority - Evaluate each road section individually Evaluate RoadSections - Evaluate a representative matrix of road classes Evaluate RoadsClasses

5. Evaluate Representative Matrix of Road Classes Advantages • Reduces the number of roads to evaluate • Generates a solution catalog with recommended road works for each road class • Makes it easier to define the strategies to be evaluated • Disadvantage: The road classes are characterized with average values

6. traffic and roughness are common to all evaluations to define the road condition, roughness is complemented by cracking or deflections or a surface distress index region, road width, functional classification or percentage of trucks may be considered to better characterize the network is desirable a limit of 400 road classes with more than 0 km Definition of Road Classes

7. Definition of Condition Categories

8. Road Classes Characterization Condition C - Asphalt Concrete Good Fair Poor 1500 C1A C1B C1C 1,2,3 - Traffic Traffic (AADT) C2A C2B C2C 3000 A,B,C - Condition C3A C3B C3C 6000

9. each country identifies the road works to evaluate each road work has a different design life estimated by the HDM-4 Model and the purpose of the evaluation is to identify for each road class a recommended design life (road work or level of investment) based on network budget constraints Definition of Road Works

10. Responsive or Scheduled Works

11. Alternatives are defined so that a road work is scheduled in a given calendar year followed by a condition-responsive maintenance policy that keeps the road in good condition after the road work is executed Schedule First Road Work

12. First Periodic Road Work Condition Good Fair Poor 1500 C1A C1B C1C Traffic (AADT) C2A C2B C2C 3000 C3A C3B C3C 6000 - Reseals 12 mm - Reseals 12 mm- Overlays 5 cm - Overlays 5 cm- Overlays 8 cm Works occur in years 2008, 2009, 2010 or 2011 followed afterwards by 5.0 overlays at 3.5 IRI

13. Current Network Statistics

14. Optimal Wok Program NPV (M $) Alternative Good Fair Poor Good Fair Poor 1500 1500 0 4 14 Base O503 O800 4 15 101 ST03 O501 O800 3000 3000 7 206 250 ST03 O500 O800 6000 6000 NPV / Investment (M$) IRR (%) Good Fair Poor Good Fair Poor 1500 0 0.6 1.4 1500 NA 25 32 2.0 2.2 10.3 3000 26 40 61 3000 3.5 29.4 25.5 6000 41 76 109 6000

15. Comparison of Budget Scenarios

16. Consequences to Society Benefits

17. Allocation of Resources

18. Consequences to Road Agency

19. Network Length Distributionand Average Roughness Similar Charts for Network Utilization Distribution

20. Network on Stable Condition

21. average network roughness weighted by length or utilization (vehicle-km) is presented for each budget scenario Average Network Roughness

22. a solution catalog is found for each budget level, which presents a recommended road work and timing for its application the solution maximizes the net present value of the network Solution Catalog

23. Support for Programming: Recommended Road Works Sorted by Priority

24. Map with Recommended Solution