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Modeling Snow and Cold Effects for Classified Highway Traffic Vo
노혁재,Satish Sharma,Prasanta K. Sahu 대한토목학회 2016 KSCE JOURNAL OF CIVIL ENGINEERING Vol.20 No.4
This paper discusses about the effect of snowfall, temperature, and their interaction on two vehicle classes: passenger cars, and trucks on a primary highway in Alberta, Canada. The investigation is based on large data collected from the Weigh-In-Motion (WIM) site located at Leduc, on Highway 2A. The variations on traffic volume for vehicle classes are analyzed by means of a dummyvariable regression model with seven cold categories. The models are calibrated to estimate the temperature impact on daily traffic variations and, more specifically, to quantify the interaction effect of snowfall and temperature on classified traffic volume. The study results suggested distinctive patterns in traffic variations for passenger cars and trucks. The daily passenger car volume reduction is 12% when the temperature goes below -25oC and, by interaction between snow and cold, it was reduced by 36% at the temperature range -25oC ~ -20oC with 16cm snowfall. Conversely, the daily truck traffic is generally increased for all cold categories. In particular, truck traffic is not really affected by snow and cold interaction even at extreme winter weather conditions. The paper contributes to the literature by analyzing the winter weather effects on truck traffic, in particular. This study may be useful for developing efficient highway monitoring programs, and winter road maintenance programs, etc.
후지타 다카요시(Fujita Takayoshi),노혁재(Roh Hyuk-Jae),김경철(Kim Gyeng-Chul) 한국철도학회 2004 한국철도학회 학술발표대회논문집 Vol.- No.-
Nowadays, becoming wide area is going on over Seoul Metropolitan area. But urban railway, very important traffic facilities, is operated in normal operating position and it gives cause to week the function of commuting long distance. This paper is focus on studying the feasibility of rapid operation system in Seoul Metropolitan area through comparing the present state of urban railway in Seoul Metropolitan area with a case of the advanced facilities in developed country. And we develop rapid operation system in general aspect through only consideration of operation planning without improvement of facilities. Also, we come up with new concept of rapid operation system through investigation of limits of the preceding researches.
후지타 다카요시(Fujita Takayoshi),노혁재(Roh Hyuk-Jae),김경철(Kim Gyeng-Chul) 한국철도학회 2004 한국철도학회 학술발표대회논문집 Vol.- No.-
This parer aims to suggest the feasibility of rapid operation scheme generated in preceding study, "A study on development of operation planning for rapid service in urban railway(An introduction)" through application it to present subway lines in Seoul Metropolitan area. In case of line 3, without the Passing Track "Turning train outstrip mode" is the best policy. In case of line 4, with the Passing Trank "Passing track mode" may be the best way to realize the this scheme. Also, there is feasibility in the line 1, line 5, line 6, line 7 but there is no possibility it is applied to line 2 and line 8. In conclusion, this parer is intend to suggest the possibility of rapid operation in urban railway by presenting real operation scheme, time tables and amount of power usage and the number of composing trains and variety of demand.