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Determination of the Friction Coefficients of Icy Pavements Under Different Amounts of Snowfall
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Photogrammetric approach to detect road pavement friction
Zdeneˇk Svatý1, Pavel Vrtal1, Roman Shults2
1CTU in Prague, FTS, Department of Forensic Experts in Transportation, Prague 1, The Czech Republic.
Plos One
|February 14, 2025
Summary
Photogrammetry offers a new non-contact method for measuring pavement macrotexture and determining skid resistance. This technique provides accurate results comparable to traditional methods, making it a viable alternative for road surface assessment.
Area of Science:
- Civil Engineering
- Geotechnical Engineering
- Metrology
Background:
- Pavement skid resistance is crucial for road safety.
- Existing measurement methods can be time-consuming or require direct contact.
- A non-contact method for assessing pavement macrotexture is needed.
Purpose of the Study:
- To evaluate photogrammetric measurements for pavement macrotexture analysis.
- To develop a non-contact method for determining pavement skid resistance.
- To compare photogrammetry results with the sand method and establish calibration limits.
Main Methods:
- Photogrammetric measurements of pavement samples with varying macrotextures.
- Development and testing of 23 different measurement combinations.
- Comparison with reference measurements using the sand method.
- Calculation of measurement error rates.
Main Results:
- The best-fit plane using the four highest macrotexture points yielded reliable friction results.
- Optimal sub-area size for mask application was determined to be 7.5-10 mm.
- Photogrammetry demonstrated accuracy comparable to the sand method.
Conclusions:
- Photogrammetry is a suitable and accurate tool for pavement surface texture assessment.
- This non-contact method can serve as an effective alternative to existing skid resistance measurement techniques.
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