A STUDY ON THE ANALYSIS OF THE ROAD TRAFFIC SERVICE CHARACTERISTIC CORRESPONDING TO SNOWFALL AND ON THE ESTIMATION METHOD OF BENEFITS BY SNOW REMOVAL BASED ON THE ANALYSIS

摘要

In this research, the influence on the road traffic by the snow coverage in winter isrnanalyzed based on the positive data with which constant observation traffic data and trafficrnprobe data were united properly, and the estimating method of benefits by snow removalrnon the running time shortening which is bringing road users more effects is proposed.rnAt first, the characteristics of the road traffic service in winter is analyzed by roadrnconditions of roadside and number of lanes and by road surface conditions with constantrnobservation traffic data and the weather survey data such as snowfall accumulation andrnthe depth, etc, and the QVK performance curves, which indicate the relation betweenrntraffic volume (Q), spot speed (V) and traffic density (K), are presumed at each traffic datarnobservation point. Next, the relation between the traffic data at the constant observationrnpoint and the traffic data of the probe at the link including the point concerned is analyzedrnon each link. Finally, the total travel time among some snow conditions at each link ofrnroad network is calculated, benefit by decreasing the total travel time by snow removal willrnbe estimated by using this.