Full Defect Mapping

RPS provides full road surface defect mapping

Radar Portal Surveys provides as standard full defect crack maps of the road surface. For each defect we automatically determine both extent and severity measures, such as crack width, length, type, GPS location, chainage and position within the lane. Standard markups also include all patch locations. Further road surface features, such as bleeding, delamination, raveling and shoving and even tree root heave can also be marked.

The result is an unambiguous list of surface features, from which cracking statistics are then mined. This quantitative method of rating a surface eliminates most of the subjectivity, resulting in higher quality assessments. One of our standard outputs is as per the ROCOND90 method. Other methods can also be used, as per customer requirements.

Full defect mapping graph

 

The graph above summaries the different techniques for road surface condition assessment: including field surveys, video collection and RPS's automated collection system.

Traditional survey methods have good precision, but are high cost. Their precision reduces due to the amount of manual entry with the data. Video based collection is cheap, but is only effective in obtaining a general condition assessment of the roads due to the lack of surface resolution. RPS's system uses high precision data capture, which results in a higher precision mark-up of the road surface.

Radar Portal Surveys provides as standard full defect crack maps of the road surface. For each defect we automatically determine both extent and severity measures, such as crack width, length, type, GPS location, chainage and position within the lane. Standard markups also include all patch locations. Further road surface features, such as bleeding, delamination, raveling and shoving and even tree root heave can also be marked.

The result is an unambiguous list of surface features, from which cracking statistics are then mined. This quantitative method of rating a surface eliminates most of the subjectivity, resulting in higher quality assessments. One of our standard outputs is as per the ROCOND90 method. Other methods can also be used, as per customer requirements.

Crack mapping and full defect mapping

Example Cracking Mapping output showing the location and severity of both linear and crocodile cracking features as well as patching. Crack severity is normally displayed as the crack colour. Patches are also shown. Displaying the surface image is optional (normally not shown in crack mapping outputs).

Defect mapping graph

Cracking can be shown as percentage cracking graphs, allowing similar analysis for the results.

When cracks are detected early, they can be sealed via lower cost rehabilitation measures such as this crack sealing. If cracks are too wide, or have progressed into the road base then these sealing methods may not last as long. As a result, it is very important to get to cracks early. The PaveScout surface imaging system is the only system in the world that allows the detection of these smaller cracks.

Crack repair

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