Investigation on Two-Stop-Line Signalized Roundabout: Capacity and Optimal Cycle Length
Two-stop-line signalized roundabouts (TSLSR) are widely utilized in China. To calculate the capacity and optimal cycle length accurately, a model considering internal space constraint of the roundabout is developed in this paper. Firstly, the operational principle of TSLSR is analyzed. TSLSR is mode...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Journal of Advanced Transportation |
| Online Access: | http://dx.doi.org/10.1155/2019/5720290 |
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| author | Ze-hao Jiang Tao Wang Chao-yang Li Fei Pan Xiao-guang Yang |
| author_facet | Ze-hao Jiang Tao Wang Chao-yang Li Fei Pan Xiao-guang Yang |
| author_sort | Ze-hao Jiang |
| collection | DOAJ |
| description | Two-stop-line signalized roundabouts (TSLSR) are widely utilized in China. To calculate the capacity and optimal cycle length accurately, a model considering internal space constraint of the roundabout is developed in this paper. Firstly, the operational principle of TSLSR is analyzed. TSLSR is modeled as being equivalent to a four-phase intersection with left-turn protection phases, and the left-turn lane is further simplified as the “short-lane model”. Secondly, based on the above analysis, the capacity of TSLSR is modeled and additionally, the accuracy and sensitivity of the model are also analyzed. Finally, the optimal cycle length of TSLSR which maximizes the capacity is put forward. Results show that the accuracy of the capacity model is low without considering the internal space constraint of the roundabout. However, the model developed in this paper is shown to improve the accuracy (about 20%) and control the relative error to be within 10%. The parameter sensitivity analysis demonstrates that the cycle length and radius of the central island have a significant influence on the capacity of the left-turn lane and results in an optimal value of signal cycle length maximizing the capacity. |
| format | Article |
| id | doaj-art-4873bd970199402e8ebbdad062c08357 |
| institution | Kabale University |
| issn | 0197-6729 2042-3195 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Advanced Transportation |
| spelling | doaj-art-4873bd970199402e8ebbdad062c083572025-02-03T05:43:56ZengWileyJournal of Advanced Transportation0197-67292042-31952019-01-01201910.1155/2019/57202905720290Investigation on Two-Stop-Line Signalized Roundabout: Capacity and Optimal Cycle LengthZe-hao Jiang0Tao Wang1Chao-yang Li2Fei Pan3Xiao-guang Yang4Key Laboratory of Road and Traffic Engineering, Ministry of Education, Tongji University, Shanghai 200092, ChinaSchool of Naval Architecture, Ocean & Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaSchool of Naval Architecture, Ocean & Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaKey Laboratory of Road and Traffic Engineering, Ministry of Education, Tongji University, Shanghai 200092, ChinaKey Laboratory of Road and Traffic Engineering, Ministry of Education, Tongji University, Shanghai 200092, ChinaTwo-stop-line signalized roundabouts (TSLSR) are widely utilized in China. To calculate the capacity and optimal cycle length accurately, a model considering internal space constraint of the roundabout is developed in this paper. Firstly, the operational principle of TSLSR is analyzed. TSLSR is modeled as being equivalent to a four-phase intersection with left-turn protection phases, and the left-turn lane is further simplified as the “short-lane model”. Secondly, based on the above analysis, the capacity of TSLSR is modeled and additionally, the accuracy and sensitivity of the model are also analyzed. Finally, the optimal cycle length of TSLSR which maximizes the capacity is put forward. Results show that the accuracy of the capacity model is low without considering the internal space constraint of the roundabout. However, the model developed in this paper is shown to improve the accuracy (about 20%) and control the relative error to be within 10%. The parameter sensitivity analysis demonstrates that the cycle length and radius of the central island have a significant influence on the capacity of the left-turn lane and results in an optimal value of signal cycle length maximizing the capacity.http://dx.doi.org/10.1155/2019/5720290 |
| spellingShingle | Ze-hao Jiang Tao Wang Chao-yang Li Fei Pan Xiao-guang Yang Investigation on Two-Stop-Line Signalized Roundabout: Capacity and Optimal Cycle Length Journal of Advanced Transportation |
| title | Investigation on Two-Stop-Line Signalized Roundabout: Capacity and Optimal Cycle Length |
| title_full | Investigation on Two-Stop-Line Signalized Roundabout: Capacity and Optimal Cycle Length |
| title_fullStr | Investigation on Two-Stop-Line Signalized Roundabout: Capacity and Optimal Cycle Length |
| title_full_unstemmed | Investigation on Two-Stop-Line Signalized Roundabout: Capacity and Optimal Cycle Length |
| title_short | Investigation on Two-Stop-Line Signalized Roundabout: Capacity and Optimal Cycle Length |
| title_sort | investigation on two stop line signalized roundabout capacity and optimal cycle length |
| url | http://dx.doi.org/10.1155/2019/5720290 |
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