Mn/DOT Combined Smoothness Specification Operator Certification Training Workshop July 12, 2010

1. Mn/DOT Combined Smoothness Specification Operator Certification Training Workshop July 12, 2010

2. Combined Smoothness Spec. • What’s Different? • Smoothness evaluation • Areas of localized roughness (ALR) • Profile Viewing and Analysis (ProVAL) software • Profile Summary worksheets • Operator certification

3. 1. Smoothness Evaluation • Both the right and left wheel paths must be profiled with a certified Inertial Profiler. • After corrective work, an IRI value will be computed for each wheel path, for each 528-foot segment, and then averaged. This average IRI value will used to calculate the segment pay adjustment. • IRI values will be determined with ProVAL’s “Ride Quality: Fixed Interval.” • Exclusion: paving with posted speeds < 45 mph

4. 2. Areas of Localized Roughness • Will replace bumps/dips • 25-foot continuous IRI that exceeds 125.0 inches/mile • Will be analyzed in the right wheel path only • ALR and grinding locations will be determined by ProVAL’s “Smoothness Assurance.”

5. 2. Areas of Localized Roughness • ALR that exist after paving will require corrective work. • ALR that remain after corrective work will be assessed a deduction of either $5.00 per linear foot or $10.00 per linear foot, depending on the magnitude of roughness. • Exclusion: paving with posted speeds < 30 mph

6. Required Data by Posted Speed • 1. Posted Speed ≥ 45 mph • Smoothness (both wheel paths) • ALR (right wheel path only) • 10-foot straightedge • 2. 30 mph ≤ Posted Speed < 45 mph • ALR (right wheel path only) • 10-foot straightedge • 3. Posted Speed < 30 mph • 10-foot straightedge

7. ALR > Bumps/Dips • Areas of localized roughness are generated from IRI, an index that measures what passengers actually feel. • Accurate identification of bumps/dips is hindered by the design of the California Profilograph. • The California Profilograph ignores or minimizes some bumps/dips, while exaggerating or manufacturing others.

8. Because its front and rear wheels are in contact with the pavement surface, the profilograph cannot accurately measure the pavement profile. Design Limitations of Profilograph

9. Actual Profile Dip Profilograph Trace Dip Phantom Bumps Do These Bumps Really Exist?

10. Sample Profile

11. 25-foot sliding window Applying a 25-foot Moving Average

12. 125 feet 54 in/mi Continuous IRI: 25-foot Intervals

13. Areas of Localized Roughness 125 in/mi Areas of Localized Roughness

14. 3. ProVAL • Developed by the Transtec Group for the U.S. Federal Highway Administration (FHWA) and the Long Term Pavement Performance Program (LTPP) • Free to download at www.roadprofile.com • Contractor ERD values will be imported into ProVAL to calculate 528-foot IRI values, areas of localized roughness, and recommended grinding locations.

15. Getting Started

16. Add Files

17. Add Files

18. Viewer

19. Analysis

20. Ride Quality

21. Ride Quality ALR

22. Ride Quality 528’ IRI Values

23. Smoothness Assurance

24. Smoothness Assurance Grinding ALR

25. Smoothness Assurance Grinding

26. Smoothness Assurance Grinding

27. Smoothness Assurance Grinding

28. Smoothness Assurance Grinding

29. Smoothness Assurance Grinding

30. Exercise #1 • Let’s practice creating the first set of ProVAL reports that must be submitted to the Project Engineer: • Ride Statistics at Intervals (within 5 days of paving placement) • Smoothness Assurance Grinding (prior to corrective work) • Open ProVAL and load “Exercise1.erd.”

31. Smoothness Assurance Histograms ALR

32. Smoothness Assurance Histograms

33. Smoothness Assurance Histograms Enter this value into Profile Summary’s 125 ≤ ALR < 150 box

34. Smoothness Assurance Histograms

35. Smoothness Assurance Histograms Enter this value into Profile Summary’s 150 ≤ ALR < 250 box

36. Exercise #2 • Let’s practice creating the final set of ProVAL reports that must be submitted to the Project Engineer: • Ride Statistics at Intervals (within 5 days of corrective work) • Smoothness Assurance ALR Histograms (within 5 days of corrective work) • Open ProVAL and load “Exercise2.erd.”

37. Editor

38. Editor

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40. Editor

41. Editor

42. Editor

43. Editor

44. Editor Enter this value into Profile Summary’s 150 ≤ ALR < 250 box

45. Editor

46. Editor

47. Editor

48. Editor

49. Exercise #3 • Let’s practice using ProVAL’s Editor to create two subsections: • 1,000 feet to 3,000 feet • 3,500 feet to 5,500 feet • After creating the new sections, let’s compare their respective IRI values. • Open ProVAL and load “Exercise3.erd.”

50. 4. Profile Summary Worksheets • All green cells are to be filled in by contractor. • 528-foot IRI values must be entered for each wheel path. The average IRI will be calculated automatically by the worksheet. • ALR data should be entered only on the first Profile Summary for an ERD file.