Analysis on Capacity of Unsignalized Intersection on Urban Arterial Road in Slight Snowy Weather

In order to evaluate traffic operation status of unsignalized intersection on arterial road in slight snowy weather, it was studied that the influence of slight snow on capacity of unsignalized intersection. Critical gap and following headway data of one unsignalized intersections were observed by video method. And gap accepting theory was adopted to calculate the capacity of unsignalized intersection. An example was given for calculating the capacity of an unsiglized intersection on normal pavement and slight snowy pavement. It showed that capacity of unsignalized intersection in slight snowy weather decreased by 11.26% compared with on sunny weather.