TY  - JOUR
PY  - 2014//
TI  - Influence of thin water film on skid resistance
JO  - Journal of traffic and transportation engineering (Valley Cottage, NY)
A1  - Do, Minh-Tan
A1  - Cerezo, Veronique
A1  - Beautru, Yannick
A1  - Kane, Malal
SP  - 36
EP  - 44
VL  - 2
IS  - 1
N2  - Most of past researches on the skid resistance/road wetness relationship deal with thick water depths (> 1 mm). Questions remain as to the variation of skid resistance with thin water films and the transition between the dry state and the so-called "damp" or "humid" state at which the skid resistance drop can be as high as 30%-40%. This paper deals with a theoretical and experimental assessment of the friction-water depth relationship. The main objective is to estimate local water depths trapped between the tire and the road asperities and to define a so-called "critical" water depth which can be used to detect risky situations for road users. Tests are performed in laboratory. It was found that the friction-water depth curves have an inverse-S shape and present an initial constant-friction part before decreasing to a minimum value. A "critical" water depth, defined as the water depth above which the friction coefficient collapses significantly, is determined from observed friction-water depth curves. Influence of test speed and road surface texture on critical water depth is discussed.<p /> <p>Language: en</p>
LA  - en
SN  - 2328-2142
UR  - http://dx.doi.org/10.17265/2328-2142/2014.06.004
ID  - ref1
ER  -