The Effect of the Number of Right-Turn and Left-Turn Lanes on the Performance of Undersaturated Signalized Intersections
Vehicle traffic flow channelizing can significantly contribute to fewer collisions and smooth traffic flow in isolated signalized intersection design. Therefore, this study investigates the effect of changes in the number of right-turn lanes with splitter islands and left-turn storage bays for diffe...
Main Authors: | , , |
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Format: | Article |
Language: | English |
Published: |
Hindawi-Wiley
2023-01-01
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Series: | Journal of Advanced Transportation |
Online Access: | http://dx.doi.org/10.1155/2023/8764498 |
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author | Omid Rahmani Amir Saman Abdollahzadeh Nasiri Iman Aghayan |
author_facet | Omid Rahmani Amir Saman Abdollahzadeh Nasiri Iman Aghayan |
author_sort | Omid Rahmani |
collection | DOAJ |
description | Vehicle traffic flow channelizing can significantly contribute to fewer collisions and smooth traffic flow in isolated signalized intersection design. Therefore, this study investigates the effect of changes in the number of right-turn lanes with splitter islands and left-turn storage bays for different volume approaches on intersection performance. This study aims to provide an accurate analysis to estimate the effect of such changes on signalized intersections, which can improve intersection performance. Furthermore, the delay parameter derived from HCM2016 and simulation was evaluated for different scenarios. For this purpose, simulation was performed using Synchro software. In this study, a symmetrical, 90-degree, undersaturated (volume per capacity lower than 1, V/C < 1), and four-leg intersection were considered according to AASHTO Green Book 2018 suggestions. HCM2016 results indicated the delay parameter was less sensitive to the undersaturated condition than the right-turn volume variation for both single and dual-lane bays. However, the simulation results indicated that the delay parameter was not constant, depending on the number of right-turn lanes and volumes. On the other hand, there was a significant difference in delay parameters between the single and dual left-turn lanes for both simulation and HCM cases estimated 77.4% and 59.7%, respectively. Overall, this study can provide a vision for traffic engineers to modify the geometry of the four-leg signalized intersections, if the right-turn or left-turn demand volume of an undersaturated signalized intersection is larger than the through approach. |
first_indexed | 2024-04-10T05:25:48Z |
format | Article |
id | doaj.art-7110621274d7494eb47f494bdd7d0b2b |
institution | Directory Open Access Journal |
issn | 2042-3195 |
language | English |
last_indexed | 2024-04-10T05:25:48Z |
publishDate | 2023-01-01 |
publisher | Hindawi-Wiley |
record_format | Article |
series | Journal of Advanced Transportation |
spelling | doaj.art-7110621274d7494eb47f494bdd7d0b2b2023-03-08T00:00:11ZengHindawi-WileyJournal of Advanced Transportation2042-31952023-01-01202310.1155/2023/8764498The Effect of the Number of Right-Turn and Left-Turn Lanes on the Performance of Undersaturated Signalized IntersectionsOmid Rahmani0Amir Saman Abdollahzadeh Nasiri1Iman Aghayan2Faculty of Civil EngineeringDepartment of Civil EngineeringFaculty of Civil EngineeringVehicle traffic flow channelizing can significantly contribute to fewer collisions and smooth traffic flow in isolated signalized intersection design. Therefore, this study investigates the effect of changes in the number of right-turn lanes with splitter islands and left-turn storage bays for different volume approaches on intersection performance. This study aims to provide an accurate analysis to estimate the effect of such changes on signalized intersections, which can improve intersection performance. Furthermore, the delay parameter derived from HCM2016 and simulation was evaluated for different scenarios. For this purpose, simulation was performed using Synchro software. In this study, a symmetrical, 90-degree, undersaturated (volume per capacity lower than 1, V/C < 1), and four-leg intersection were considered according to AASHTO Green Book 2018 suggestions. HCM2016 results indicated the delay parameter was less sensitive to the undersaturated condition than the right-turn volume variation for both single and dual-lane bays. However, the simulation results indicated that the delay parameter was not constant, depending on the number of right-turn lanes and volumes. On the other hand, there was a significant difference in delay parameters between the single and dual left-turn lanes for both simulation and HCM cases estimated 77.4% and 59.7%, respectively. Overall, this study can provide a vision for traffic engineers to modify the geometry of the four-leg signalized intersections, if the right-turn or left-turn demand volume of an undersaturated signalized intersection is larger than the through approach.http://dx.doi.org/10.1155/2023/8764498 |
spellingShingle | Omid Rahmani Amir Saman Abdollahzadeh Nasiri Iman Aghayan The Effect of the Number of Right-Turn and Left-Turn Lanes on the Performance of Undersaturated Signalized Intersections Journal of Advanced Transportation |
title | The Effect of the Number of Right-Turn and Left-Turn Lanes on the Performance of Undersaturated Signalized Intersections |
title_full | The Effect of the Number of Right-Turn and Left-Turn Lanes on the Performance of Undersaturated Signalized Intersections |
title_fullStr | The Effect of the Number of Right-Turn and Left-Turn Lanes on the Performance of Undersaturated Signalized Intersections |
title_full_unstemmed | The Effect of the Number of Right-Turn and Left-Turn Lanes on the Performance of Undersaturated Signalized Intersections |
title_short | The Effect of the Number of Right-Turn and Left-Turn Lanes on the Performance of Undersaturated Signalized Intersections |
title_sort | effect of the number of right turn and left turn lanes on the performance of undersaturated signalized intersections |
url | http://dx.doi.org/10.1155/2023/8764498 |
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