1. Emmanuel Fernando, Texas A&M Transportation Institute and and Magdy Mikhail, Texas Department of Transportation Texas Department of Transportation Road Profile User’s Group Meeting, San Antonio, Texas, September 2013

5. TaskDescriptionStatus1 Procure site to build new test tracks Completed 2 Develop construction plans Completed 3 Solicit bids and construct new test tracks Completed 4 Perform preliminary tests Completed 5 Prepare project report Completed

8. LWP MPD: 0.591 mm RWP MPD: 0.575 mm

9. LWP MPD: 1.961 mm RWP MPD: 1.918 mm

10. LWP MPD: 1.848 mm RWP MPD: 1.795 mm

11. LWP MPD: 3.055 mm RWP MPD: 2.045 mm

12. LWP MPD: 1.686 mm RWP MPD: 1.908 mm

13. LWP MPD: 1.570 mm RWP MPD: 1.199 mm

14. Locate wheel paths and delineate with paint dots at 5- ft intervals. Locate wheel paths and delineate with paint dots at 5- ft intervals. Collect elevation readings at 1- inch intervals using SurPRO. Collect elevation readings at 1- inch intervals using SurPRO. Tie SurPRO data to a common benchmark using rod and level measurements collected at 190-ft intervals. Tie SurPRO data to a common benchmark using rod and level measurements collected at 190-ft intervals. Make 3 repeat reference profile runs per wheel path. Make 3 repeat reference profile runs per wheel path.

15. Section Avg. Standard Deviation (mils) LWPRWP 1-inch longitudinally tined 9.519.52 ½-inch transversely tined 9.129.66 1-inch transversely tined 9.909.75 Entire CRCP Test Track 9.579.65

16. Section Avg. Cross- Correlation (%) LWPRWP 1-inch longitudinally tined 9898 ½-inch transversely tined 9898 1-inch transversely tined 9999 Entire CRCP test track 9998

17. Section IRI standard deviation (in/mile) LWPRWP 1-inch longitudinally tined 0.440.61 ½-inch transversely tined 0.750.46 1-inch transversely tined 0.360.25 Entire CRCP test track 0.250.40

18. Section Avg. Standard Deviation (mils) LWPRWP Permeable friction course 9.619.56 Inverted prime 11.8319.29 Grade 3 chip seal 10.7912.71 Entire PFC-Chip Seal Track 10.6713.40

19. Section Avg. Cross- Correlation (%) LWPRWP Permeable friction course 99100 Inverted prime 9999 Grade 3 chip seal 9999 Entire PFC-Chip Seal Track 9999

20. Section IRI standard deviation (in/mile) LWPRWP Permeable friction course 0.250.25 Inverted prime 0.260.51 Grade 3 chip seal 0.610.40 Entire PFC-Chip Seal Track 0.150.29

23. Single-pt. IRI: 85.0 in/mile Roline IRI: 54.4 in/mile Reference IRI: 53.0 in/mile

24. Profiler/Laser IRI standard deviation (in/mile) LWPRWP 3209H/Single-point9.159.89 3287G/Single-point9.7012.69 04-172/Roline0.140.65 TTI/19mm3.154.29

25. Profiler/Laser LWPRWP 3209H/Single-point 9.15 (30%) 9.89 (25%) 3287G/Single-point 9.70 (27%) 12.69 (21%) 04-172/Roline 0.14 (99%) 0.65 (97%) TTI/19mm 3.15 (61%) 4.29 (54%)

26. Profiler/Laser IRI difference (in/mile) LWPRWP 3209H/Single-point42.643.3 3287G/Single-point43.552.0 04-172/Roline1.54.5 TTI/19mm19.818.7

27. Profiler/Laser LWPRWP 3209H/Single-point 42.6 (27%) 43.3 (21%) 3287G/Single-point 43.5 (24%) 52.0 (18%) 04-172/Roline 1.5 (92%) 4.5 (83%) TTI/19mm 19.8 (57%) 18.7 (50%)

28. Profiler/Laser IRI standard deviation (in/mile) LWPRWP 3209H/Single-point0.661.16 3287G/Single-point0.832.52 04-172/Roline0.240.46 TTI/19mm0.511.81

29. Profiler/Laser IRI difference (in/mile) LWPRWP 3209H/Single-point2.93.1 3287G/Single-point2.24.9 04-172/Roline3.98.7 TTI/19mm2.82.8

30. 0  390: 95% 0  528: 84%

31. IRI difference: 8.7 in/mile Cross-correlation: 80%

32. Profiler/Laser IRI standard deviation (in/mile) LWPRWP 3209H/Single-point1.110.68 3287G/Single-point1.371.51 04-172/Roline1.350.40 TTI/19mm0.620.62

33. Profiler/Laser IRI difference (in/mile) LWPRWP 3209H/Single-point4.94.9 3287G/Single-point3.24.25 04-172/Roline5.34.7 TTI/19mm4.93.7

36. Test Roline at different footprint angles to determine optimal setup on CRCP sections. Test Roline at different footprint angles to determine optimal setup on CRCP sections. Test optimal Roline setup to verify applicability on hot-mix sections. Test optimal Roline setup to verify applicability on hot-mix sections. Run additional tests at different seasonal or prevailing weather conditions to ascertain effect of temperature on CRCP profile measurements. Run additional tests at different seasonal or prevailing weather conditions to ascertain effect of temperature on CRCP profile measurements. Perform further tests on chip seal sections to determine applicable profiler certification requirements. Perform further tests on chip seal sections to determine applicable profiler certification requirements.

37. Acknowledgment The authors thank the FHWA and TxDOT for funding the construction of new profiler certification sections. The authors thank the FHWA and TxDOT for funding the construction of new profiler certification sections. The authors also acknowledge the cooperation extended by TxDOT’s Pavement Preservation Section and Dynatest in performing preliminary tests on the new profiler certification tracks. The authors also acknowledge the cooperation extended by TxDOT’s Pavement Preservation Section and Dynatest in performing preliminary tests on the new profiler certification tracks.

38. Thank you for your attention. Any questions?