1. Iowa DOT 2016 pavement distress qc/qa
InTrans –ISU

2. 3168 images >> miles
333.4 miles of PC surface
300.2 miles of AC surface

3. Added distress: slowed the process
Longitudinal cracking >>
Lane-joint
Regular
Wheelpath
Edge
Cracks >> sealed or unsealed

4. Issues Raveling: almost difficult to distinguish, exclude??
PC tining; not consistent
Lane identification is not accurate
L-joint/lane joint; always a problem
Edge crack; always a problem
Pavement type; do we check this?

5. Issues Patch boundary>>t-crack Joints>>t-crack
Joint spalling>>very minor/no spalling picked up
Misidentifications
Missed distress

6. Examples: Lane boundaries/edge crack
Image 1
Image 1_1: rumble as distress
Image 2

7. Examples: Missing cracks
Image 3
Image 4
Image 5
Image 6

8. Raveling
Image 7

9. Joints as t-crack
Image 8
Image 9
Image 9_1

10. Spalling
Image 10
Image 10_1

11. No cracks/tining as t-cracks
Image 11

12. More examples Image 12: missing crack Image 13: missing crack
Image 17: rumble strip as distress

13. More examples Image 18: raveling Image 19: joint as t-crack
Image 20: spalling??
Image 21: missing patch, joint as t-crack, spalling
Image 22: spalling
Image 23: joint as t-cracks, image stitching ??
Image 24: mis id’ed, long crack
Image 25: joint as t-crack

14. More examples Image 26 Image 27: lane, spalling
Image 28: joint as t-crack
Image 29: t-crack, spalling
Image 30

15. 60.0% pass for PC surface
57.5% pass for AC surface
58.8% overall