JSTE Journal of Traffic Engineering
Online ISSN : 2187-2929
ISSN-L : 2187-2929
Volume 1 , Issue 2
Special Edition
Showing 1-39 articles out of 39 articles from the selected issue
Special Edition A (Research Paper)
  • Katsuhiro IIDA, Makoto HIGASA
    2015 Volume 1 Issue 2 Pages A_1-A_9
    Published: February 06, 2015
    Released: February 06, 2015
    JOURNALS FREE ACCESS
    It is necessary to transmit guide information to the driver exactly because the network shape of the urban expressway has been complicated. Therefore, the contents and the designs of information signs and road displays have been examined, but an enough examination is not necessarily executed for these arrangements. In this study, the method of arranging the information sign and the road display with high effect of the information transmission to the driver based on the results of the laboratory test using a driving simulator. We obtained the finding that the information sign has a high effect of the information transmission and that the effect of the information transmission improves by arranging the road display two or more times. On the other hand, it becomes clear that the gaze time of the information sign is limited when a high car exists forward, and the annoyingness under running increases.
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  • Katsuhiro IIDA, Nanami OMOYA
    2015 Volume 1 Issue 2 Pages A_10-A_18
    Published: February 06, 2015
    Released: February 06, 2015
    JOURNALS FREE ACCESS
    Currently, no regulations have been promulgated governing graphical route information panels, and their designs are growing in diversity. In view of the expansion of our network of roads, it is vital to develop guidelines for the design of these panels so that users will find them easy to understand. The present study examined information panels at the Kusatsu junction of the Meishin Expressway. In an indoor experiment using a driving simulator, we investigated what effects user-suggested variations in the display method of information panels had on their comprehensibility and other aspects. Based on user requests to lower the volume of information on such panels, we omitted non-vital information (for example, the destinations of sub-branches from branching roadways and road line not connected to the point which shows required travel time and found that the information panels became more functional and favored by users.
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  • Sumio SHIMOKAWA, Hirohisa MORITA, Naoya KOYAMADA
    2015 Volume 1 Issue 2 Pages A_19-A_25
    Published: February 06, 2015
    Released: February 06, 2015
    JOURNALS FREE ACCESS
    Road structure (component of cross section, element of alignment, etc.) is decided by the road classification (type and class) and the design speed. And the highway planning and the advanced design are carried out using these. However, this does not guarantee the function and the level of service that a road must originally take. Especially, for roads where the traffic function is particularly important, after clearly defining the target travel speed, it is necessary to examine status of achievement and possibility of achievement by road improvements. To do this, it is necessary first to quantitatively identify the factors which reduce travel speed. In this study, as part of this investigation, the relationship between road structure and travel speed was analyzed, and a correlation was found between vertical alignment, carriageway width, horizontal alignment, and travel speed. In addition, by formulating these relationships, road structure conditions that enable a certain speed to be achieved were proposed.
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  • Noboru ISE
    2015 Volume 1 Issue 2 Pages A_26-A_31
    Published: February 06, 2015
    Released: February 06, 2015
    JOURNALS FREE ACCESS
    Recently, the food desert problem becoming serious in mainly rural areas of Japan is very important problem that should be considered on a local level. Hence, a large number of fundamental studies have been made to develop the estimation method of the number of people in food desert (PFD). However, in addition to the estimation of the number of PFD, the estimations of the demand for each shopping support service and the profit from each of them will be needed, in order to discuss about shopping support service for local needs. Therefore, this paper mainly aims to gain the fundamental knowledge to develop the models for estimating the demand for each shopping support service and the profit from each of them on a local level, from the analyses of factors influencing use frequency and WTP (Willingness to pay) of each shopping support service for PFD considering individual attributes and area characteristics.
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  • Ryuichi INAYOSHI, Norihiro MUTO, Hayato NOTOYA, Hirokazu AKAHANE
    2015 Volume 1 Issue 2 Pages A_32-A_39
    Published: February 06, 2015
    Released: February 06, 2015
    JOURNALS FREE ACCESS
    This study evaluated effects of recommending lane-changing from an over-taking lane to an adjacent lane by LED message signs on increasing traffic capacity at a sag of a motorway as a result of restricting propagation and amplification of deceleration waves by dividing vehicle platoons. The occurrence of congestion was recorded for four times by 11 video cameras. Trajectory data of individual vehicles at every 1/30 second along the observation section of approximately 1.2km were estimated based on the video image data. 177 samples of real lane-changing behavior data just before commencing the traffic congestion were extracted from the trajectory data. A microscopic lane-changing model with such as lead/lag gaps and their interaction terms as independent variables were identified based on the sample data. The model achieved approximately 83% of hitting ratio. A possibility that a platoon could be divided without causing congestion in the adjacent lane was shown by applying the model to Monte Carlo simulation if 30% of drivers intended to change their lanes.
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  • Yuu SUZUKI, Ryuhei MATSUHASHI, Hidekatsu HAMAOKA
    2015 Volume 1 Issue 2 Pages A_40-A_46
    Published: February 06, 2015
    Released: February 06, 2015
    JOURNALS FREE ACCESS
    This research was analyzed how bicyclists are conscious of riding a roadway. It was focused on number of bicyclists on a roadway. Our consideration was those number will increase if there are many other bicyclists on a roadway. The experiment was conducted by showing bicycle users the video of roadway. The experiment was conducted about various factors and categories of riding a roadway by bicycle. The purpose of the experiment was analyzing factors of riding a roadway by bicycle. In the consciousness investigation, we asked questions about driving a bicycle on a roadway. As a result, the biggest factor was the width of the edge of a roadway, followed by the width of a walkway, number of pedestrians on a walkway, number of bicyclists on a roadway. Moreover, it was shown that bicyclists on a roadway will increase if there are many other bicyclists on a roadway. They will increase largely when their number increase from zero to two.
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  • Yuichiro KANEKO, Akira TANAKA
    2015 Volume 1 Issue 2 Pages A_47-A_53
    Published: February 06, 2015
    Released: February 06, 2015
    JOURNALS FREE ACCESS
    The object of this study is to understand travel behavior of elderly persons by questionnaire survey in the Tokyo metropolitan area. The results of this study are as follows. First, the frequency of shopping and work is high and the number of hospital visits is increased with age, most elderly persons are moving by car and foot in residential areas. Secondly, based on the survey results, it was found that the frequency of use of rail is relatively high and bus is low because rail has been used to go to work and leisure. In addition, it is from survey results, place of residence, employment, status of car ownership, health, silver path have an impact on the frequency of use of public transport. Finally, free tickets of railway and bus affected the behavior of elderly persons. This is an important viewpoint in considering traffic policy for elderly persons in the future.
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  • - Case study in Nissin city, Aichi prefecture -
    Naoyuki ITO, Yukimasa MATSUMOTO
    2015 Volume 1 Issue 2 Pages A_54-A_61
    Published: February 06, 2015
    Released: February 06, 2015
    JOURNALS FREE ACCESS
    “Kururin-bus” is a so-called community bus operated by Nissin city in Aichi prefecture. The bus runs all over the city 11 times a day with 7 circular courses and 1 central shuttle line. The fare of 1 ride is 100 yen (200 yen for the central shuttle line). In this study, a stated preference survey was conducted to the passengers of “Kururin-bus” for grasping their consciousness on the fare change. The frequency change of bus usage was analyzed with the survey result when the fare of 1 ride would be changed. As a result, it is found that the frequency of bus usage might decrease if the fare would be raised, and there are some users who would decide to stop using “Kururin-bus”. Furthermore, the model to estimate a frequency distribution of bus usage was constructed with the fare changes, which shows that the influence of the fare change on the frequency of bus usage is different by the current frequency. The impact of the fare change is significant if a passenger scarcely uses “Kururin-bus”.
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  • Yasuhiro MIMURA, Koji NODA, Shunichi YAMAOKA, Hiroshi OGHINO
    2015 Volume 1 Issue 2 Pages A_62-A_68
    Published: February 06, 2015
    Released: February 06, 2015
    JOURNALS FREE ACCESS
    Dynamic Speed Display Sign (DSDS), which can provide speeding information using a sensor detecting vehicle speed and an electric signboard, has been installed as a speed control measures on some other country's streets especially the sites where it is difficult to install physical devices such as Speed Hump. In order to install the DSDS on the streets in Japan as same as the other countries, consideration of providing information from the DSDS to drivers is extremely important. The purpose of this study is to clarify the effects, which are changing the driving speeds and the acceptance of the DSDS, providing the information about obeying the speed limit through the comparison of the effects of the providing information about speeding. As a result, it was found that while providing information about obeying the speed limit to the drivers could reduce the 85 percentile speed of the vehicles rather than the ordinary speed limit sign, there was no significant difference between the two devices regarding the average speed and the acceptance of the DSDS.
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  • Miho OHARA, Takanori SAWARA, Makoto FUJIU
    2015 Volume 1 Issue 2 Pages A_69-A_78
    Published: February 06, 2015
    Released: February 06, 2015
    JOURNALS FREE ACCESS
    Recently, implementation of new vehicle information and communication system (VICS) is being proposed. By implementing the new VICS, a driver can receives disaster information according to the location of the car by car navigation system. In this research, the effect of disseminating flood information by the new VICS was estimated using person trip survey data and flood hazard map data. At first, a model for disaster information reach ratio was developed based on a questionnaire survey for drivers during the past torrential rain. Next, disaster information reach ratio among drivers in the expected inundation area of flood hazard map with implementation of the new VICS was estimated in the Sagamigawa and Kanamegawa river basin in Kanagawa Prefecture in Japan using the developed model and person trip survey data in the area. As a result, it was confirmed that the implementation of the new VICS in the future could enhance the information reach ratio among drivers.
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  • Masahiro TADA, Katsuhiro IIDA, Sihyoung AN, Norihiro YAMADA
    2015 Volume 1 Issue 2 Pages A_79-A_87
    Published: February 06, 2015
    Released: February 06, 2015
    JOURNALS FREE ACCESS
    Our statistical analysis of accident records on expressway in past five years showed that two different kinds of accidents (i.e. side-by-side collision and rear-end-collision) occurred at accident-prone toll barriers (TBs). Besides, as a safety indicator for conflict risk assessment, TTC (Time-To-Collision) is widely used. However, since TTC regards size of each vehicle as a single dot to simplify calculation, identifying types of conflict is difficult. Therefore, in this study, we propose new safety indicator 2-D TTC for identifying types of conflict by considering size information of each vehicle when calculating TTC. To know detailed information about traffic conflicts on TBs, we analyzed 845 vehicle trajectories on an accident-prone TB and assessed traffic conflict risk among vehicles at the TB using 2-D TTC. As a result, we detected 11 near-miss conflicts; among them, 5 conflicts are judged as side-by-side collision risk, and 6 conflicts are judged as rear-end-collision risk. This result shows that two different kinds of conflict risk could simultaneously increase at TBs.
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  • Katsuhiro IIDA, Sadahiro TSUBOI, Masahiro TADA, Norihiro YAMADA
    2015 Volume 1 Issue 2 Pages A_88-A_96
    Published: February 06, 2015
    Released: February 06, 2015
    JOURNALS FREE ACCESS
    Although traffic accidents caused by elderly drivers are increasing, fundamental measures against these accidents have not been conducted. This study remarks tunnels on expressway where accident happens frequently, and compares driving behaviors of elderly drivers and non-elderly drivers. Moreover, this study examines which driving behaviors of elderly drivers raise collision risk. As a result, no significant difference between elderly drivers and non-elderly drivers has been confirmed. But the driving action of elderly drivers tends to raise collision risk in comparison with that of non-elderlies. The results above-mentioned give us a hypothesis that elderly drivers are not conscious of vehicle forward, and their consciousness of collision is less than that of non-elderlies. So, we interviewed 40 subjects (20 elderlies and 20 non-elderlies) by showing videos of accident-prone and evaluated each subject’s risk perception ability. The result shows that less consciousness of vehicle forward and collision cause elderly drivers’ risky behavior around tunnels on expressway.
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  • Koichi IMURA, Aya KOJIMA, Hisashi KUBOTA
    2015 Volume 1 Issue 2 Pages A_97-A_106
    Published: February 06, 2015
    Released: February 06, 2015
    JOURNALS FREE ACCESS
    Recently, the number of bicycle accidents are increasing with the increasing population of cyclists. In particular, the accidents of the elderly and women riding with an infant are outstanding. The authors thought that is caused by instability when starting partly. Then we focused on the full electric bike which is one of the electric two-wheeled mobility. In Japan, the full electric bike isn’t treated as a bicycle by the law, but it has the potential to run safer than the conventional bicycle because it can run only with a throttle and diminish the wamble when starting. Then, we conducted experiments about the safety and comfort of the full electric bike and did a comparative analysis with the regular bike and the electric assisted bicycle. In the result, it was revealed that full electric bike is more stable and run more comfortable than the other two bikes. On the other hand, it was revealed that there are some problems such as the weight of the full electric bikes.
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  • Azusa GOTO, Hideki NAKAMURA
    2015 Volume 1 Issue 2 Pages A_107-A_115
    Published: February 06, 2015
    Released: February 06, 2015
    JOURNALS FREE ACCESS
    For functionally hierarchical road planning, it is important to set the appropriate target network defined by the number of road levels, road spacing and target travel speed of each road level, considering distribution of urban city centers, target travel time among them and demand characteristics. This study proposes a methodology to determine the variables that define target network based on the percentage of urban centers between which their target travel time is achieved as well as construction cost. In this methodology, target travel speed ratio is assumed to be proportional to road spacing ratio between two connected road levels, and the road levels with the highest or lowest target travel speed needs to be given in advance. These assumptions enable to limit the number of scenarios with realistic combinations of road spacing and target travel speed under the trade-off between mobility and access functions. Finally, a simple case study is conducted with a hypothetical grid network assuming some typical urban center distribution. As a result, the effects of number of road levels and target travel speeds on travel time by trip length and construction cost are demonstrated.
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  • Hideyuki KITA, Kohei TSUJI, Hirofumi YOTSUTSUJI
    2015 Volume 1 Issue 2 Pages A_116-A_122
    Published: February 06, 2015
    Released: February 06, 2015
    JOURNALS FREE ACCESS
    In planning public transport, the major interest is to satisfy the needs of residents. However in the area with poor public transport service, the need may be formed too small because of adaptive recognition. That is to say it is necessary to focus on “activity opportunities” instead of “needs”, in planning public transport. The richness of activity opportunity possessed by residents can be evaluated at how many of places they can visit to act, how flexible they can act in time, and how short they can reach these places. We supposed a series of accessibility index to measure the level of activity opportunity. But there is no accessibility index dealing with components, which may influence activity opportunity, such as the diagram, physical fatigue from walking, and business hours of facilities, comprehensively. Then, this study aims to propose an accessibility index developed by integrating these previous studies. Through a case study, the order of estimated values of accessibility index of places to the city center and the order of subjective level of accessibility of the places shows good fitness.
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  • Hiroaki INOKUCHI, Takamasa AKIYAMA
    2015 Volume 1 Issue 2 Pages A_123-A_132
    Published: February 06, 2015
    Released: February 06, 2015
    JOURNALS FREE ACCESS
    The low carbon traffic as well as urban activities are recommended in the district based smart cities proposed recently. The traffic management involving CEV (Clean Energy Vehicles) such as electric vehicles (EV) is discussed in the study. The road traffic management with increase of EV in the target area as the former foreign settlement of Kobe. The impact of increase of EV to the road traffic flow can be estimated with referring to the acceleration performance of EV. The road traffic simulation with estimation of carbon dioxide emission is introduced. The network traffic flow in the district can be estimated through the increase of EV. It is known from the results that the efficient traffic can be realized from the increase of EV on the networks. Furthermore, the EV dominant zone is assumed in the district for future traffic management. The proposed management can be evaluated effectively in the district in terms of environmental load as well as traffic flow on the networks.
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  • Yohei FUJIGAKI, Kiyoshi TAKAMI, Nobuaki OHMORI, Noboru HARATA
    2015 Volume 1 Issue 2 Pages A_133-A_141
    Published: February 06, 2015
    Released: February 06, 2015
    JOURNALS FREE ACCESS
    This paper proposes an equilibrium analysis method and a profit maximization method to derive the optimal fare and number of vehicles for a high convenience flat-rate shared-ride taxi service. The targeted service of the analysis is high convenience shared ride taxi services in which users can get on within 10 to 30 minutes on average after their request, and aimed at being an alternative to driving a car. In the equilibrium analysis, the interaction between the waiting time and the membership is analyzed, by combining a demand function and a performance function derived from an operation simulation. Using the functional relation of the fare and the number of vehicles on the equilibrium membership, the optimization method to decide the fare and the number of vehicles is proposed. In addition, a calculation example of the equilibrium analysis and the optimization process is presented using the demand function estimated from a survey and the performance function derived from an original operation simulation.
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  • Koji SUZUKI, Masashi HORI
    2015 Volume 1 Issue 2 Pages A_142-A_148
    Published: February 06, 2015
    Released: February 06, 2015
    JOURNALS FREE ACCESS
    This study analyzes route choice consciousness of cyclists considering users’ characteristics based on questionnaire. First, we defined the emphasis score for route choice and conducted aggregate analyses. As a result, it is shown that the sports cycle (SC) users tend to highly evaluate for road condition, without bumps, without on-street parking vehicle/bicycle than the city cycle users and the long trip users have a tendency to give importance to the running stability than the short trip users by statistical test. Second, we conducted linear discriminant analysis and clarified the influence of the vehicle type and their trip lengths on their route choice evaluation for five evaluation items. Finally, we identified the six-factors for route choice consciousness by factor analysis and considered about the differences in users characteristics. It is revealed that SC users with long trip length worry about travelling fluidity and exogenous load, whereas city cycle users with short length trip concern about good visibility and good road condition.
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  • Tomoya KAWASAKI, Tomoyuki TODOROKI, Shotaro NISHIYAMA
    2015 Volume 1 Issue 2 Pages A_149-A_157
    Published: February 06, 2015
    Released: February 06, 2015
    JOURNALS FREE ACCESS
    In this study, yield management is introduced to demand responsive transport being operated in Sammu City of Chiba Prefecture. Transport mode choice model is developed in order to estimate the impact of introducing yield management on the number of passenger and earnings. As a result of the analysis, the higher discount rate, the larger number of passenger can be expected. In case fare is assumed as 100 yen whereas current fare is 300 yen, the number of passengers will be increased by approximately 4%. However, in this case, total earnings are decreased due to low profitability per a passenger. In case fare is set as more than 300 yen, for example 350 to 500 yen, although the number of passenger to use demand responsive transport is decreased, total earnings are still higher than 100 yen case. It is also revealed that the existence of cancellation fee declines the probability of choosing demand responsive transport by approximately 4%.
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  • Yasuhiro SHIOMI, Tatsuya KOZONO
    2015 Volume 1 Issue 2 Pages A_158-A_164
    Published: February 06, 2015
    Released: February 06, 2015
    JOURNALS FREE ACCESS
    It is well known that under the condition of high traffic volume lane-flow distribution becomes unbalanced; more traffic tends to use a median lane rather than a middle and outer lane, which causes the deterioration of traffic capacity at bottleneck sections. This study analyzed the characteristics of lane-based traffic flow and lane-change behaviors at sag sections by using a multi-lane first-order traffic flow model for freeway networks. In the model, lane changes are considered as a stochastic behavior that an individual driver decrease his/her disutility or cost and are represented as dynamics toward the equilibrium of lane-flow distribution along with longitudinal traffic dynamics. The parsimony representation enables the parameter calibration by using the data collected from the conventional loop detectors. As a result of the parameter calibration using the data collected at four different sites of Chugoku expressway in Japan, including sag bottleneck, it is revealed that i) the proposed method can represent the lane flow distribution of any observation sites with high accuracy, and ii) the estimated parameters can reasonably explain the multilane traffic dynamics and the bottleneck phenomena on uphill of sag section.
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  • Keigo TAO, Seiji HASHIMOTO
    2015 Volume 1 Issue 2 Pages A_165-A_171
    Published: February 06, 2015
    Released: February 06, 2015
    JOURNALS FREE ACCESS
    In mountainous areas, issues such as taking off and reducing service of unprofitable routes of bus are becoming actualized, though efforts to public transport restricting is being carried out by each municipality, it is difficult to provide adequate bus service. Region that in spite can go to hospital and shopping about an hour round trip by using a car become a day-long in the case of using the bus is present. In this study, the bus users and non-users by, we subject to factor analysis to the anxiety of the future mobility, by using personal attributes and accessibility, bus service evaluation. As a result, both bus users and non-users, the difference of accessibility has significantly affect the anxiety of the future mobility, it is also in order to take the bus residents with peace of mind in the future, to reduce the anxiety of the future mobility is important has been shown.
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  • Kiichiro HATOYAMA, Daiki HIRAMATSU
    2015 Volume 1 Issue 2 Pages A_172-A_178
    Published: February 06, 2015
    Released: February 06, 2015
    JOURNALS FREE ACCESS
    Before the Great East Japan Earthquake, car use for tsunami evacuation has been prohibited in principle. However, some local governments have started to examine tsunami evacuation by car since then, considering the fact that more than half of the evacuees used cars and were saved from the tsunami. Thus, in this paper important viewpoints to check the feasibility of tsunami evacuation by car were discussed, and a methodology was proposed to distinguish areas where it is difficult to evacuate on foot in expected tsunami inundation zone by defining “walking evacuation speed.” Then, two indices to the degree of evacuation difficulty are proposed; one is for evacuation on foot using the concept of needed speed for evacuation, and the other is for evacuation by car using road capacity. And specific evacuation policy design is considered with these indices. Finally, the series of the methodology suggested in this paper is experimentally applied to Aki City, Kochi Prefecture.
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  • Hiroshi TATSUMI, Kayoko TSUTSUMI, Wataru FUJIBAYASHI, Syuji YOSHIKI
    2015 Volume 1 Issue 2 Pages A_179-A_186
    Published: February 06, 2015
    Released: February 06, 2015
    JOURNALS FREE ACCESS
    The purpose of this paper is to examine the consciousness for people with infants in public transportation in provincial city. The questionnaire survey was carried out in Fukuoka city, having many public transportation passengers. First, we analyzed the consciousness for people with infants sitting in a priority seat according to the following groups; people with infants, people with sons and/or daughters older than infants, and people without son and daughter. Next, we analyzed these 3 groups consciousness for using public transportation and elevator without folding stroller, infants fretting in public transportation, priority boarding of the aircraft for people with infants, and priority parking space for people with infants. Results show that many Fukuoka citizens have toleration for people with infants. However some citizens think that people with infants should fold stroller in crowed public transportation, and hence there are several internal barriers for people with infants. Therefore approaches to further promote an understanding of people with infants are required.
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  • Naoki TODOROKI , Yoshiyasu YANAGISAWA, Jun-ichi TAKAYAMA, Fumiya NAGA ...
    2015 Volume 1 Issue 2 Pages A_187-A_196
    Published: February 06, 2015
    Released: February 06, 2015
    JOURNALS FREE ACCESS
    Based on surveys on the pedestrian area satisfaction and the pedestrian behavior toward pedestrian area’s shape, pedestrian environment factor required for pedestrian preference road have been extracted. Because of the pedestrian preference road development, explicitly that design guidance and development is important. In this study, was performed in social experiment when the pedestrian area satisfaction surveys and pedestrian behavior measured in Nagano city center (Intended for Chuo-dori street ). Based on the results demonstrate the selectivity of the pedestrian 'straight', 'left and right avoidance', 'complicated', 'follow', and 'stop' action. In addition, walking speed, pedestrian density, avoidance angle also reveal. And to construct an 'Evaluation consciousness structure model of pedestrian space' that was a causal factor on the sidewalk usage data and pedestrian behavior and pedestrian space shape. To clarify the relationship between the pedestrian space service levels important to design and pedestrian space satisfaction evaluation in the pedestrian preference road.
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  • Atsushi FUJII, Nobuhiro UNO, Toshiyuki NAKAMURA, Koji YAMAMOTO
    2015 Volume 1 Issue 2 Pages A_197-A_206
    Published: February 06, 2015
    Released: February 06, 2015
    JOURNALS FREE ACCESS
    In recent years, due to the improvement in facilities and services at expressway rest areas, parking demand tends to concentrate on the specific rest areas and hereby serious parking congestion occurs. As one of countermeasures, expressway companies have provided information of parking congestion at expressway rest area to the drivers traveling on the expressway by information board, to encourage drivers to use the rest areas with relatively low congestion. However, the quality of information is not high enough because of the gap between point in time at which drivers obtain the information and the one at which they arrive at the corresponding rest area. In order to improve the quality of information, this study is aimed at developing a model of prediction of parking rate at expressway rest area, using parking situation data of rest areas and traffic volume data of main line. We apply the prediction model for some rest areas on Shin-Tomei Expressway in order to analyze the how much improvement can be obtained.
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  • Masami YANAGIHARA, Nobuhiro UNO, Toshiyuki NAKAMURA
    2015 Volume 1 Issue 2 Pages A_207-A_216
    Published: February 06, 2015
    Released: February 06, 2015
    JOURNALS FREE ACCESS
    Drivers should have intentions to follow the leading vehicle, to decelerate, or to merge safely with merging vehicle while they are driving. These intentions are regarded as meaningful factors to understand driving behaviors. We call these intentions “Driving Intentions”, and try to reveal the influence of the external stimulation based on classifiable Driving Intentions. In an empirical study, Driving Intentions were collected through interviews with subjects after driving experiments on virtual expressways using a driving simulator. Information for safety merging was provided to the subject drivers at a merging section on one of the virtual expressways for the experiment. We analyze the effect of the provided information as a specific external stimulation. It is found that drivers change their Driving Intentions in the section of an expressway where the information provided. Then we use the information of Driving Intentions for the analysis of two relationships. One is the relation between the provided information and Driving Intentions, and the other is the relation between Driving Intentions and vehicles’ movements.
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Special Edition B (Practical Paper)
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