Method and apparatus for measuring road surface conditions
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United States of America Patent
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Sep 1, 1998
Grant Date -
N/A
app pub date -
Sep 6, 1996
filing date -
Sep 8, 1995
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention relates to a method and apparatus for measuring road surface conditions. In the method of measuring road surface conditions, the conditions prevailing on the surface of a road are measured by a sensor head mounted in the pavement of the road with the top surface of the sensor head aligned substantially flush with the pavement of the road. According to the invention, an optical signal is impinged from below the road to the top surface of the road, the reflection/backscatter of the optical signal is measured inside the pavement layer of the road, and weather/driving conditions prevailing on the road top surface are determined from the reflected and backscattered signal values.
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