engleski

Analysis of Vehicle Path Radii on Horizontal Curves for Two-Lane Rural Roads

In order to obtain locations with reduced level of consistency, vehicle path radii on horizontal curves for two-lane rural roads were analysed. The data collected in an experimental survey on a segment of the two-lane state road DC1 in Croatia were used, in which the drives of a representative sample of drivers were recorded with a high frequency GPS device. The stepwise linear regression was used to investigate the possible influence of geometric characteristics of the road on the driver's choice of path radius and no statistically significant correlation was found. The analysis showed that the vehicle path radii were mainly smaller than curve radius (on average for 12%). The largest deviations of vehicle path radii from designed values were found on sharper curves (R < 150 m), indicating an increased risk of skidding which may be related to the fact that sharp curves are associated with high accident rates.

vehicle path radius ; horizontal curve ; design consistency ; global positioning system (GPS) ; vehicle stability

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