Strategy Selection Process
Developed by the CP2
Center
By
R. Gary Hicks and Ding Cheng
CP2 Center, CSU, Chico
for the
Spri...
• Types of Treatments
• Strategy Selection
Process
• Case Studies
• Summary and
recommendations
Much of this work has been...
3
Condition
Time
$1-3 for
preventive
maintenance
here
Costs $10-20
or more
when it’s
done as
rehab
Cost Effectiveness Pave...
What is Treatment Selection?
4
A guide to assist maintenance personnel in
making better and more informed decisions in
sel...
Treatment Selection Based
on Pavement Condition
5
Issues Treatment Selection
Addresses
6
• Will the treatment address the distresses
present? (i.e., Will it work?)
• Can th...
Strategy Selection Process
• Assess Pavement
Conditions
• Determine Feasible
Treatment Options
• Analyze and
Compare Feasi...
Assess Current
Conditions
8
• Assess Existing Pavement Conditions
–Conduct visual site inspection and/or
review project in...
Fatigue (Alligator) Cracking
9
LOW MODERATE HIGH
Load Related, HMA Thickness
Rutting and Depressions
10
Ruts in Wheel Paths Depression
Load + Environmental
Typically Upper 4 in.
Support Issue
Typical...
Transverse and Block Cracking
11
Thermal Cracking
Block Cracking
Environmental
Early in Pave. Life
Environmental
+ Age
Factors Affecting
Treatment Selection
12
• Pavement age and condition
• Climate
• Traffic levels, expected future plans
• ...
Treatment Selection
Matrix
13
• Covers all the major treatment types
currently used by Caltrans for flexible
pavements and...
User Interface – Main Page
14
•Treatment Life
•Treatment Cost
•Interest Rate
Equivalent
Annual Cost
15
Advantage of the
Preliminary Developed
Expert System
• Uses Caltrans MTAG existing decision
matrix
• Can deal with more co...
Case Histories Provided by LA County
• Information needed:
– Type and extent of
distress prior to
treatment
– Traffic leve...
Imperial Highway – Shoemaker
Avenue/Valley View Avenue (RD 446)
• PCI of 57 (Evaluation Date: 8/29/2011)
• Predominant dis...
Imperial Highway
Overhill Drive – Slauson
Avenue/Stocker Street (RD 233)
• PCI of 59 (Evaluation Date: 4/16/2013)
• Predominant distresses ...
Overhill Drive
Via Marina – Washington
Street/1727 Bora Bora Way (RD 433)
• PCI of 73 (Evaluation Date: 10/27/2011)
• Predominant distres...
Via Marina
What Strategy Would be Best
for Each Case?
• Imperial Highway- Heavy cracking and
traffic
• Overhill-Medium cracking and
i...
Imperial Highway
Overhill Drive
Via Marina
Discussion of Results
• Projects
– Imperial Highway
– Overhill Drive
– Via Marina
• Alternatives
– Preservation
– Rehab
– ...
Summary
• Types of Surface
Treatments
• Strategy Selection
Process Using Life
Cycle Cost
• Case Histories
• Aids in making...
For More Information
• Check with Ding
Cheng, the developer
of the program
• The Center can
provide training on the
use of...
Any Questions?
rghicks@csuchico.edu
530-588-4446
and
dxcheng@csuchico.edu
530-588-0155
31
www.cp2info.org/Center
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Gary Hicks - Pavement Preservation Strategies

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Presentation delivered at the CalAPA Spring Asphalt Pavement Conference April 9-10, 2014 in Ontario. Topic: Pavement preservation strategies, incuding a new software developed by the Pavement Preservation Center at CSU Chico to assist in identifying pavement preservation strategies.

Published in: Engineering, Business, Technology
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Gary Hicks - Pavement Preservation Strategies

  1. 1. Strategy Selection Process Developed by the CP2 Center By R. Gary Hicks and Ding Cheng CP2 Center, CSU, Chico for the Spring California Asphalt Pavement Conference April 9-10, 2014
  2. 2. • Types of Treatments • Strategy Selection Process • Case Studies • Summary and recommendations Much of this work has been supported by Caltrans Overview of Presentation 2
  3. 3. 3 Condition Time $1-3 for preventive maintenance here Costs $10-20 or more when it’s done as rehab Cost Effectiveness Pavement Preservation
  4. 4. What is Treatment Selection? 4 A guide to assist maintenance personnel in making better and more informed decisions in selecting and applying maintenance treatments In other words… What do we do with this?
  5. 5. Treatment Selection Based on Pavement Condition 5
  6. 6. Issues Treatment Selection Addresses 6 • Will the treatment address the distresses present? (i.e., Will it work?) • Can the required preparation for the treatment be carried out? • Is the treatment cost effective? • Will the treatment be performed before the situation being addressed changes?
  7. 7. Strategy Selection Process • Assess Pavement Conditions • Determine Feasible Treatment Options • Analyze and Compare Feasible Options 7
  8. 8. Assess Current Conditions 8 • Assess Existing Pavement Conditions –Conduct visual site inspection and/or review project information –Perform testing on the existing pavement, as conditions require –Define the performance requirements for the treatment
  9. 9. Fatigue (Alligator) Cracking 9 LOW MODERATE HIGH Load Related, HMA Thickness
  10. 10. Rutting and Depressions 10 Ruts in Wheel Paths Depression Load + Environmental Typically Upper 4 in. Support Issue Typically Full Depth
  11. 11. Transverse and Block Cracking 11 Thermal Cracking Block Cracking Environmental Early in Pave. Life Environmental + Age
  12. 12. Factors Affecting Treatment Selection 12 • Pavement age and condition • Climate • Traffic levels, expected future plans • Available funding • Agency policy • Availability of Contractors
  13. 13. Treatment Selection Matrix 13 • Covers all the major treatment types currently used by Caltrans for flexible pavements and allows for inclusion of future strategies • Treatment selection is a complex, yet important procedure to ensure a optimum pavement treatment • CP2 Center has developed a program to do this for you
  14. 14. User Interface – Main Page 14
  15. 15. •Treatment Life •Treatment Cost •Interest Rate Equivalent Annual Cost 15
  16. 16. Advantage of the Preliminary Developed Expert System • Uses Caltrans MTAG existing decision matrix • Can deal with more complex scenarios? • Knowledge is retained to the system • New treatments and costs can be added at any time 16
  17. 17. Case Histories Provided by LA County • Information needed: – Type and extent of distress prior to treatment – Traffic level, ADT or TI – Climate or environment region – Cost and estimated treatment life
  18. 18. Imperial Highway – Shoemaker Avenue/Valley View Avenue (RD 446) • PCI of 57 (Evaluation Date: 8/29/2011) • Predominant distresses consist of 40% moderate alligator cracking • Traffic Index = 10 • Environment Region- South Coast Mediterranean climate
  19. 19. Imperial Highway
  20. 20. Overhill Drive – Slauson Avenue/Stocker Street (RD 233) • PCI of 59 (Evaluation Date: 4/16/2013) • Predominant distresses consists of 10% slight alligator and 50% slight map cracking • Traffic Index= 7 • Environment Region- South Coast Mediterranean climate
  21. 21. Overhill Drive
  22. 22. Via Marina – Washington Street/1727 Bora Bora Way (RD 433) • PCI of 73 (Evaluation Date: 10/27/2011) • Predominant distresses consists of 30% slight map cracking • Traffic Index = 8 • Environment Region- South Coast Mediterranean climate •
  23. 23. Via Marina
  24. 24. What Strategy Would be Best for Each Case? • Imperial Highway- Heavy cracking and traffic • Overhill-Medium cracking and intermediate traffic • Via Marina-Light cracking and traffic http://ceresearch.ecst.csuchico.edu/Treatment Selection2.0/View/LoginPage.aspx
  25. 25. Imperial Highway
  26. 26. Overhill Drive
  27. 27. Via Marina
  28. 28. Discussion of Results • Projects – Imperial Highway – Overhill Drive – Via Marina • Alternatives – Preservation – Rehab – Reconstruction
  29. 29. Summary • Types of Surface Treatments • Strategy Selection Process Using Life Cycle Cost • Case Histories • Aids in making better decisions 29
  30. 30. For More Information • Check with Ding Cheng, the developer of the program • The Center can provide training on the use of the program • We can also customize it to fit your needs
  31. 31. Any Questions? rghicks@csuchico.edu 530-588-4446 and dxcheng@csuchico.edu 530-588-0155 31 www.cp2info.org/Center
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