VARIABLE TRAFFIC OPERATIONAL GUIDELINE FOR DYNAMIC LANE ALLOCATION; FOCUSING ON TEMPORARY CLOSURE OF CLIMBING LANE

摘要

Interest in dynamic lane allocation is recently increasing as a way of resolving trafficcongestion and preventing traffic accidents in advance through efficient use of the roads.This study tried to establish variable traffic operational guideline suitable for trafficcharacteristic and to analyze its effects with the example of climbing lane.By selecting climbing section of Nakdong junction (for Masan), VISSIM-microscopic trafficsimulation-analysis was conducted with the traffic operational variables such as v/c, heavyvehicle ratio. As the result of simulation, it was analyzed that the operation of climbing lanewill have bigger operational effect in general traffic situation with no congestion, but theclosure of climbing lane will be effective in traffic operation in case v/c and heavy vehicleratio increase. As the result, in consideration of simulation analysis result, expresswayoperability, and drivers’ perceptibility, average travel speed of 50km/h in climbing sectionwas selected as operational standard (critical travel speed) which can determine theoperation or closure of climbing lanes.We established a variable traffic operational guideline base on critical travel speed withflexible management process for dynamic lane allocation on climbing lane. We conducteda dynamic lane allocation based on collected traffic data as a guideline, limited theminimum cycle of change in order to prevent driver’s confusion, and suggested systemconfiguration for that.