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Innovative techniques with multi-purpose survey vehicle for automated analysis of cross-slope data.
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2007-11-02
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Abstract:Manual surveying methods have long been used in the field of highway engineering to determine
the cross-slope, and longitudinal grade of an existing roadway. However, these methods are
slow, tedious and labor intensive. Moreover, manual survey methods almost always require
partial or full lane closure resulting in traffic delays, increase in costs, and inconvenience to the
travelling public. In 2003, the Florida Department of Transportation (FDOT) acquired a state-ofthe-
art Multi-Purpose Survey Vehicle (MPSV) which combines the advantage of an inertial
profiler with the additional ability to simultaneously collect images, cross-slope, longitudinal
grade, curvature, rutting, and roughness at highway speed.
To complement the MPSV system, an automated analysis tool has been developed to process
pavement geometry data for identifying areas with cross-slope and longitudinal grade
deficiencies in a fast and efficient manner. In addition, this analytical tool computes a drainage
path along the pavement surface. The program also displays the analysis results in two and threedimensional
graphical formats allowing for an easier interpretation of the data.
The MPSV technology coupled with the developed cross-slope analysis tool provide an
effective, practical, and cost effective method to quickly identify potential problem-prone areas
along a highway. This paper presents an innovative technique for the analysis of cross-slope and
longitudinal profile data, which helps identify areas with cross-slope and surface drainage
deficiencies. Highway agencies can successfully implement similar systems and analysis
methodology to complement and enhance their existing safety and pavement management
programs.
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