TY  - JOUR
PY  - 2011//
TI  - Empirical study of impact of icy roadway surface condition on driver car-following behavior
JO  - Transportation research record
A1  - Park, Sangjun
A1  - Rakha, Hesham
A1  - Alfelor, Roemer
A1  - Yang, C. Y. David
A1  - Krechmer, Daniel
SP  - 140
EP  - 151
VL  - 2260
IS  - 
N2  - Research was done to quantify the impact of icy roadway conditions on driver car-following behavior. The data used in the study were gathered by a group of researchers at Japan's Hokkaido University in a controlled environment under dry and icy roadway conditions. The data were used to calibrate the Van Aerde steady-state car-following model, along with vehicle acceleration and deceleration constraints. The impact of icy roadway conditions on five driver-specific car-following parameters [driver perception-reaction time (PRT), free-flow or desired speed, speed-at-capacity, capacity, and jam density] was conducted with one-way analysis of variance and Kruskal-Wallis tests. The results demonstrate that icy roadway conditions produce statistically significant differences at a 5% significance level. Specifically, icy roadway conditions reduce the mean free-flow speed, speed at capacity, and capacity by 28%, 13%, and 46%, respectively, compared with driving on dry roadways. The mean PRT for icy conditions is found to take 13% longer than driving under dry conditions. The longer PRTs can be attributed to drivers driving at lower speeds and larger spacing on icy surfaces compared with dry conditions.<p /> 
LA  - en
SN  - 0361-1981
UR  - http://dx.doi.org/10.3141/2260-16
ID  - ref1
ER  -