1. Pavement Preservation Design April 20, 2009 2009 Roadway Conference

2. Pavement Services Unit Pavement Services Manager Pavement Design Pavement Management Pavement Quality Pavement Materials

3. Preservation Program  Add useful life to the road without increasing capacity.  May include reconstruction to re- establish an existing roadway.  Includes inlays, overlays, or other rehabilitation type alternatives.

4. Before…

5. After!

6. Pavement Design Inputs Maintenance History Construction History Traffic Distress Survey Subgrade Strength Pavement/Base: Conditions/Depths Field Work Construction Limitations

7. Field Crew in Operation

8. Subgrade Strength: Falling Weight Deflectometer

9. NDT Load “Strong” Pavement “Weak” Pavement Strong vs. Weak Pavements

10. Base: Conditions/Depths

11. Pavement: Conditions/Depths

14. 3 1 2 4 5 6 7 8 9 10 11 12 0 MP 1.22 PD #15 MP 1.276 PD #16 MP 1.295 PD #17 MP 1.404 PD #18 MP 1.432 PD #19 MP 1.46 PD #20 MP 1.523 PD #21 Good ACFair ACPoor ACOil Mat Stripping Bridge #3584Bridge #3585Bridge #3586

15. Construction Limitations

17. Pavement Preservation Design Tools  ODOT Overlay  AASHTO 1993  AASHTO MEPDG

18. Engineering Analysis and Judgment

19. When to Contact Pavement Services  Early in the Design Process  Anytime the scope changes (even if it doesn’t seem like it will impact the pavement – we don’t mind phone calls or e-mails)  Schedule changes

20. Questions?