Pavement Deterioration Model & Maintenance Decision Tree

The Pavement Deterioration Model provides forecasts on future pavement conditions using deterministic and probabilistic modeling techniques. It also discusses Maintenance Decision Trees outlining treatments, costs, and applications based on road conditions. The decision tree helps in determining maintenance strategies based on factors like road width, PSI, RUT, and more. Explore transportation engineering concepts and calculations to determine total maintenance costs for road segments.

• - Pavement
• Modeling Techniques
• Maintenance Decision Tree
• Transportation Engineering
• Road Maintenance

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Uploaded on Feb 26, 2025 | 1 Views

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1. Pavement Deterioration Model Pavement deterioration model forecasts future pavement conditions. 1

2. Pavement Deterioration Model, Modeling Techniques Deterministic : A deterministic model is one in which every set of variable states is uniquely determined by parameters in the model and by sets of previous states of these variables Probabilistic or Stochastic: In probabilistic model, randomness is present, and variable states are not described by unique values, but rather by probability distributions. Markov process is commonly used probabilistic technique.

3. Maintenance Decision Tree Details and Applications Treatment Est. Type Cost/Mile GM General Maintenance Procedure Asphalt Patching Pothole Repair Crack Sealing Road Striping Chip Seal Micro-surface Thin Overlay (<2 ) Surface Preparation (mil, level, full-depth reclamation, or combination thereof) Thick Overlay (>2 ) Seal Coat 1-R plus shoulder or widening requirements Applicable on roads in good condition with shoulder needs 2-R plus shoulder or widening requirements Applicable on narrow roads with shoulder or widening needs Complete Reconstruction $0 1-R GM General Maintenance 1-R Preventive Rehabilitation $60,000 3-R 2-R 2-R Minor Rehabilitation $250,000 4-R 3-R Preventive Rehabilitation with Shoulder Needs $350,000 4-R Major Rehabilitation $650,000 5-R 5-R Full Reconstruction $1,200,000 3

4. Maintenance Decision Tree 5-R PSI < 1.0 Road Width <= 28 Road With > 28 4-R 1.0 <= PSI < 2.0 2-R Road Width <= 28 Road With > 28 Road Width <= 26 Road Width > 26 Road Width <= 28 Road Width > 28 Road Width <= 26 Road Width > 26 4-R RUT >0.3 2-R 2.0 <= PSI < 2.5 Rural Roads 3-R RUT < =0.3 1-R 4-R RUT >0.3 2-R 2.5 <= PSI < 3.0 3-R Rut < =0.3 1-R Road Width <= 26 Road Width > 26 3-R PSI => 3.0 GM 4

5. Transportation Engineering CE Lecture 1 Maintenance Decision Tree, Example Segment # 1 2 3 4 5 6 Road Width 29 29 29 25 25 25 PSI Length Rut 2.2 2.1 2 3 4.5 3.5 0.1 2 1 2 3 1 0.4 0.4 0.4 0.2 0.2 0.2 1 5 2 4 3 6 Determine total cost to maintain all the segments? 5

6. Transportation Engineering CE Lecture 1 Maintenance Decision Tree, Example, solution Segment # Road Width PSI Length Rut Treatment Cost $250,00 0 *0.1 1 2.2 0.1 29 0.4 2-R 2 3 4 5 6 2.1 2 3 4.5 3.5 2 1 2 3 1 29 29 25 25 25 0.4 0.4 0.2 0.2 0.2 Determine total cost to maintain all the segments? 6

7. Optimization Model, Example Total Needs: $15 M Available Budget: $3 M Figure: Schematic of an Optimization Model 7

8. Optimization Model, Methodology 8

9. Optimization Model, Capital Improvement Plan (CIP) Segment ID Road Name 222-1 3 6 19-1 222 Year1 Year2 Year3 GM GM GM GM 1-R Year4 GM GM 1-R GM GM Year5 GM GM GM 1-R GM 1-R GM GM GM GM Chalk Bluff Road/"78" Rd GM Albin/LaGrange Rd Black hills Rd Old Highway Birns West Chalk Bluff Road/"78" Rd GM GM GM GM 9

10. Optimization Model, Formulation Maximize Subject to 10

11. Transportation Engineering CE Lecture 1 Optimization Model, Example Segment # 1 2 3 4 5 6 Length , miles 0.1 2 1 2 3 1 PSI 1 2.2 2.1 2 3 4.5 3.5 5 2 4 3 6 Determine overall pavement condition? 11

12. Transportation Engineering CE Lecture 1 Optimization Model, Example If we have 3 segments, how many possible combinations? If we have 17 segments, how many possible combinations? Draw a curve of possible options against number of segments. 12

13. Transportation Engineering CE Lecture 1 Pavement Management Systems, dataset required 1.IRI, Rut, PCI, Road width, AADT 2.Pavement deterioration model 3.Pavement performance model 4.Maintenance decision tree 5.Maintenance cost 6.Maintenance improvement matrix 7.Available budget 13

14. PMS Deliverables pavement condition report Electronic Data Electronic GIS Maps & Video Logs 14

15. Software Required? VBA in Excel Optimization Software 15