Comparative Analysis of Deterministic Fundamental Diagrams Representative of Continuous and Interrupted Traffic Flow on Selected Regional Road in Croatia
Since the inception of the traffic flow theory, numerous traffic flow models have been formulated by scholars in an effort to more accurately delineate the relationships between various traffic flow parameters. However, only a limited number of studies have explored the distinctions between fundamen...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-01-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/14/2/533 |
| _version_ | 1797340192782155776 |
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| author | Bojan Jovanović Marko Ševrović Grgo Luburić |
| author_facet | Bojan Jovanović Marko Ševrović Grgo Luburić |
| author_sort | Bojan Jovanović |
| collection | DOAJ |
| description | Since the inception of the traffic flow theory, numerous traffic flow models have been formulated by scholars in an effort to more accurately delineate the relationships between various traffic flow parameters. However, only a limited number of studies have explored the distinctions between fundamental traffic diagrams, which characterize continuous and interrupted traffic flow conditions. Addressing this research lacuna, we compared twelve “speed–density” and “flow–density” models fitted to empirical data collected under continuous and interrupted traffic flow conditions on a selected regional road in Croatia. The empirical data used to develop these models were extracted from video footage captured by an unmanned aerial vehicle on two representative road segments during characteristic peak and off-peak hours on workdays. Our analysis reveals that, depending on the selected traffic flow model and prevailing traffic flow conditions, the practical capacity of the observed regional road is estimated to be in the range from 799 to 2333 veh/h/lane. It was also discovered that the considered models reach practical capacity at a significantly different density under continuous and interrupted traffic stream conditions, i.e., between 37 and 129 veh/km/lane. The conducted <i>t</i>-tests underscore the need to employ distinct “speed–density” and “flow–density” regression functions for modeling continuous and interrupted traffic stream conditions. |
| first_indexed | 2024-03-08T09:58:26Z |
| format | Article |
| id | doaj.art-0cd855ec578e4badb1f8341ec72337f6 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-08T09:58:26Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-0cd855ec578e4badb1f8341ec72337f62024-01-29T13:42:30ZengMDPI AGApplied Sciences2076-34172024-01-0114253310.3390/app14020533Comparative Analysis of Deterministic Fundamental Diagrams Representative of Continuous and Interrupted Traffic Flow on Selected Regional Road in CroatiaBojan Jovanović0Marko Ševrović1Grgo Luburić2Department of Transport Planning, Faculty of Transport and Traffic Sciences, University of Zagreb, 10000 Zagreb, CroatiaDepartment of Transport Planning, Faculty of Transport and Traffic Sciences, University of Zagreb, 10000 Zagreb, CroatiaDepartment of Transport Planning, Faculty of Transport and Traffic Sciences, University of Zagreb, 10000 Zagreb, CroatiaSince the inception of the traffic flow theory, numerous traffic flow models have been formulated by scholars in an effort to more accurately delineate the relationships between various traffic flow parameters. However, only a limited number of studies have explored the distinctions between fundamental traffic diagrams, which characterize continuous and interrupted traffic flow conditions. Addressing this research lacuna, we compared twelve “speed–density” and “flow–density” models fitted to empirical data collected under continuous and interrupted traffic flow conditions on a selected regional road in Croatia. The empirical data used to develop these models were extracted from video footage captured by an unmanned aerial vehicle on two representative road segments during characteristic peak and off-peak hours on workdays. Our analysis reveals that, depending on the selected traffic flow model and prevailing traffic flow conditions, the practical capacity of the observed regional road is estimated to be in the range from 799 to 2333 veh/h/lane. It was also discovered that the considered models reach practical capacity at a significantly different density under continuous and interrupted traffic stream conditions, i.e., between 37 and 129 veh/km/lane. The conducted <i>t</i>-tests underscore the need to employ distinct “speed–density” and “flow–density” regression functions for modeling continuous and interrupted traffic stream conditions.https://www.mdpi.com/2076-3417/14/2/533traffic flow theorytraffic flow modelingfundamental traffic flow diagramcorrelation analysisregression analysisunmanned aerial vehicles |
| spellingShingle | Bojan Jovanović Marko Ševrović Grgo Luburić Comparative Analysis of Deterministic Fundamental Diagrams Representative of Continuous and Interrupted Traffic Flow on Selected Regional Road in Croatia Applied Sciences traffic flow theory traffic flow modeling fundamental traffic flow diagram correlation analysis regression analysis unmanned aerial vehicles |
| title | Comparative Analysis of Deterministic Fundamental Diagrams Representative of Continuous and Interrupted Traffic Flow on Selected Regional Road in Croatia |
| title_full | Comparative Analysis of Deterministic Fundamental Diagrams Representative of Continuous and Interrupted Traffic Flow on Selected Regional Road in Croatia |
| title_fullStr | Comparative Analysis of Deterministic Fundamental Diagrams Representative of Continuous and Interrupted Traffic Flow on Selected Regional Road in Croatia |
| title_full_unstemmed | Comparative Analysis of Deterministic Fundamental Diagrams Representative of Continuous and Interrupted Traffic Flow on Selected Regional Road in Croatia |
| title_short | Comparative Analysis of Deterministic Fundamental Diagrams Representative of Continuous and Interrupted Traffic Flow on Selected Regional Road in Croatia |
| title_sort | comparative analysis of deterministic fundamental diagrams representative of continuous and interrupted traffic flow on selected regional road in croatia |
| topic | traffic flow theory traffic flow modeling fundamental traffic flow diagram correlation analysis regression analysis unmanned aerial vehicles |
| url | https://www.mdpi.com/2076-3417/14/2/533 |
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