지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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PURPOSES : This investigational survey is to observe a proper spatial aggregation method for path travel time estimation using the hi-pass DSRC system. METHODS : The links which connect the nodes of section detectors location are used for path travel time estimation traditionally. It makes some problem such as increasing accumulation errors and processing times. In this background, the new links composition methods for spatial aggregation are considered by using some types of nodes as IC, JC, RSE combination. Path travel times estimated by new aggregation methods are compared with PBM travel times by MAE, MAPE and statistical hypothesis tests. RESULTS : The results of minimum sample size and missing rate for 5 minutes aggregation interval are satisfied except for JC link path travel time in Seoul TG~Kuemho JC. Thus, it was additionally observed for minimum sample size satisfaction. In 15, 30 minutes and 1 hour aggregation intervals, all conditions are satisfied by the minimum sample size criteria. For accuracy test and statistical hypothesis test, it has been proved that RSE, Conzone, IC, JC links have equivalent errors and statistical characteristics. CONCLUSIONS : There are some errors between the PBM and the LBM methods that come from dropping vehicles by rest areas. Consequently, this survey result means each of links compositions are available for the estimation of path travel time when PBM vehicles are missed.
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참고문헌 (11)
참고문헌 신청
Chen, M. / 2000 / Determining the number of probe vehicles for freeway travel time estimation by microscopic simulation / Transportation Research Record: Journal of the Transportation Research Board 1719(1):61~68
Chen, M. / 2001 / Dynamic Freeway Travel-Time Prediction with Probe Vehicle Data: Link Based Versus Path Based / Journal of the Transportation Research Board 2001(1768):157~161
Kim, J. J. / 2006 / An Optimal Design and Operation of the Sectionrelated Data Collecting System for Travel Time Information Focusing on Uninterrupted Traffic Flow
김낙주 / 2011 / 구간검지체계 도입을 통한 교통검지체계 설치기준 연구 / 한국ITS학회 논문지 10(3):47~63
Korea Expressway Research Institute / 2012 / Development of a Traffic Information System using the Method of Automatic Vehicle Identification based on hi-pass System
Chen, M. / 2001 / Dynamic Freeway Travel-Time Prediction with Probe Vehicle Data: Link Based Versus Path Based / Journal of the Transportation Research Board 2001(1768):157~161
Kim, J. J. / 2006 / An Optimal Design and Operation of the Sectionrelated Data Collecting System for Travel Time Information Focusing on Uninterrupted Traffic Flow
김낙주 / 2011 / 구간검지체계 도입을 통한 교통검지체계 설치기준 연구 / 한국ITS학회 논문지 10(3):47~63
Korea Expressway Research Institute / 2012 / Development of a Traffic Information System using the Method of Automatic Vehicle Identification based on hi-pass System
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