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ISSN 1822-427X print
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"The Baltic Journal of Road and Bridge Engineering"
Vilnius: Technika, 2011, Vol VI, No 3, p. 201-218


Alicja Sołowczuk

Estimation of Free-Flow Speeds on Rutted Asphalt Two-Way, Two-Lane Roads with the Soft Shoulders

DOI: 10.3846/bjrbe.2011.26
 
Within the framework of research into the road condition assessment considering the utility values, the West Pomeranian University of Technology in Szczecin Dept of Roads, Bridges and Building Materials has made a number of spot-speed measurements in free traffic flow under adverse weather conditions and on variously rutted asphalt road surfaces. This paper presents the findings on the impact of the rut depths on the 85% speed quantile, v85. Furthermore, the average speeds for passenger vehicles, voav, and for goods vehicles, vcav, reached at various available stopping sight distances, lz, are also presented herein.
 
Keywords: free-flow speeds, rutted asphalt road surfaces, available sight distance, bendiness.

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