TY  - JOUR
PY  - 2015//
TI  - A variable speed limits operation model to minimize confliction at a bottleneck section by cumulative demand-capacity analysis
JO  - Journal of Korean Society of Transportation
A1  - Lee, Junhyung
A1  - Son, Bongsoo
SP  - 478
EP  - 487
VL  - 33
IS  - 5
N2  - This study proposed a Variable Speed Limits(VSL) algorithm to use traffic information based on Cumulative Demand-Capacity Analysis and evaluated its performance. According to the analysis result, the total of delay consisted of 3 separate parts. There was no change in total travel time although the total of delay decreased. These effects was analysed theoretically and then, evaluated through VISSIM, a microscopic simulator. VISSIM simulation results show almost same as those of theoretical analysis. Furthermore in SSAM analysis with VISSIM simulation log, the number of high risk collisions decreased 36.0 %. However, the total delay decrease effect is not real meaning of decrease effect because the drivers' desired speed is same whether the VSL model is operated or not. Nevertheless this VSL model maintains free flow speed for longer and increases the cycle of traffic speed fluctuation. In other words, this is decrease of delay occurrence and scale. The decrease of speed gap between upstream and downstream stabilizes the traffic flow and leads decrease number of high risk collision. In conclusion, we can expect increase of safety through total delay minimization according to this VSL model.     Keywords  highway traffic management; high risk collision; queuing theory; speed fluctuation; variable speed limits ; 고속도로 교통관리기법; 고위험 상충건수; 대기행렬이론; 속도편차; 가변속도제어<p />  <p>Language: ko</p>
LA  - ko
SN  - 1229-1366
UR  - http://dx.doi.org/10.7470/jkst.2015.33.5.478
ID  - ref1
ER  -