Iowa DOT 2016 pavement distress qc/qa InTrans –ISU 11-14-2016

3168 images >> 633.6 miles 333.4 miles of PC surface 300.2 miles of AC surface

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

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?

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

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

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

Raveling Image 7

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

Spalling Image 10 Image 10_1

No cracks/tining as t-cracks Image 11

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

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

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

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