Analysis of moving bottlenecks considering a triangular fundamental diagram
A significant number of research efforts have studied and analyzed the case in which a vehicle is moving slower than the traffic stream. This phenomenon, known as a moving bottleneck, results in a disruption of traffic flow and may significantly impact the traffic stream behavior upstream, downstrea...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2016-10-01
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| Series: | International Journal of Transportation Science and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2046043016301459 |
| _version_ | 1797719141849759744 |
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| author | Karim Fadhloun Hesham Rakha Amara Loulizi |
| author_facet | Karim Fadhloun Hesham Rakha Amara Loulizi |
| author_sort | Karim Fadhloun |
| collection | DOAJ |
| description | A significant number of research efforts have studied and analyzed the case in which a vehicle is moving slower than the traffic stream. This phenomenon, known as a moving bottleneck, results in a disruption of traffic flow and may significantly impact the traffic stream behavior upstream, downstream and abreast the slow moving vehicle. In this paper, a macroscopic approach for modeling moving bottlenecks is developed using microscopically derived data considering a triangular fundamental diagram. The passing flow rates of different moving bottleneck scenarios are determined using a previously developed microscopic model based on simulated data derived from the INTEGRATION software. Using the simulation results, an explicit expression of the bottleneck diagram, a flow-density relationship that defines the phenomenon macroscopically is proposed and the behavior of the traffic stream downstream and abreast the moving obstruction is depicted. It is demonstrated that the behavior of the traffic stream downstream of the slow vehicle as well as the acceleration behavior while passing is governed by the demand level. Such a result is coherent and consistent, to a significant extent, with two decades of research related to modeling moving bottlenecks and constitutes a potential feasible and more detailed description of the phenomenon in the case of a triangular fundamental diagram. Finally, it is noteworthy that the research subject of this paper could be considered as a first step in developing a numerical and practitioner-friendly framework for the analysis of moving bottlenecks that does not involve approaching the problem from its theoretical perspective. |
| first_indexed | 2024-03-12T09:01:30Z |
| format | Article |
| id | doaj.art-2b87c0adc39f44a89ad2d11905b45a58 |
| institution | Directory Open Access Journal |
| issn | 2046-0430 |
| language | English |
| last_indexed | 2024-03-12T09:01:30Z |
| publishDate | 2016-10-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | International Journal of Transportation Science and Technology |
| spelling | doaj.art-2b87c0adc39f44a89ad2d11905b45a582023-09-02T15:38:02ZengKeAi Communications Co., Ltd.International Journal of Transportation Science and Technology2046-04302016-10-015318619910.1016/j.ijtst.2017.01.003Analysis of moving bottlenecks considering a triangular fundamental diagramKarim Fadhloun0Hesham Rakha1Amara Loulizi2Center for Sustainable Mobility, Virginia Tech Transportation Institute, 3500 Transportation Research Plaza, Virginia Tech, Blacksburg, VA 24061, United StatesThe Charles Via, Jr. Department of Civil and Environmental Engineering, 3500 Transportation Research Plaza, Virginia Tech, Blacksburg, VA 24061, United StatesUniversité de Tunis El Manar, Ecole Nationale d’ingénieur de Tunis, LR11ES16 Laboratoire de matériaux, d’optimisation et d’environnement pour la durabilité, B.P. 37 Le Belvédère, 1002 Tunis, TunisiaA significant number of research efforts have studied and analyzed the case in which a vehicle is moving slower than the traffic stream. This phenomenon, known as a moving bottleneck, results in a disruption of traffic flow and may significantly impact the traffic stream behavior upstream, downstream and abreast the slow moving vehicle. In this paper, a macroscopic approach for modeling moving bottlenecks is developed using microscopically derived data considering a triangular fundamental diagram. The passing flow rates of different moving bottleneck scenarios are determined using a previously developed microscopic model based on simulated data derived from the INTEGRATION software. Using the simulation results, an explicit expression of the bottleneck diagram, a flow-density relationship that defines the phenomenon macroscopically is proposed and the behavior of the traffic stream downstream and abreast the moving obstruction is depicted. It is demonstrated that the behavior of the traffic stream downstream of the slow vehicle as well as the acceleration behavior while passing is governed by the demand level. Such a result is coherent and consistent, to a significant extent, with two decades of research related to modeling moving bottlenecks and constitutes a potential feasible and more detailed description of the phenomenon in the case of a triangular fundamental diagram. Finally, it is noteworthy that the research subject of this paper could be considered as a first step in developing a numerical and practitioner-friendly framework for the analysis of moving bottlenecks that does not involve approaching the problem from its theoretical perspective.http://www.sciencedirect.com/science/article/pii/S2046043016301459Moving bottlenecksPassing rateINTEGRATION softwareTriangular fundamental diagram |
| spellingShingle | Karim Fadhloun Hesham Rakha Amara Loulizi Analysis of moving bottlenecks considering a triangular fundamental diagram International Journal of Transportation Science and Technology Moving bottlenecks Passing rate INTEGRATION software Triangular fundamental diagram |
| title | Analysis of moving bottlenecks considering a triangular fundamental diagram |
| title_full | Analysis of moving bottlenecks considering a triangular fundamental diagram |
| title_fullStr | Analysis of moving bottlenecks considering a triangular fundamental diagram |
| title_full_unstemmed | Analysis of moving bottlenecks considering a triangular fundamental diagram |
| title_short | Analysis of moving bottlenecks considering a triangular fundamental diagram |
| title_sort | analysis of moving bottlenecks considering a triangular fundamental diagram |
| topic | Moving bottlenecks Passing rate INTEGRATION software Triangular fundamental diagram |
| url | http://www.sciencedirect.com/science/article/pii/S2046043016301459 |
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