Performance Evaluation of Grade Separation Within the Selected Major Intersection in Addis Ababa City

Sentayehu Leleisa; Emer Tucay Quezon; Teyba Wedajo

doi:doi:10.11648/j.ajtte.20180303.11

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Performance Evaluation of Grade Separation Within the Selected Major Intersection in Addis Ababa City

Sentayehu Leleisa, Emer Tucay Quezon, Teyba Wedajo

Published in American Journal of Traffic and Transportation Engineering (Volume 3, Issue 3)

Received: 4 July 2018 Accepted: 16 July 2018 Published: 15 August 2018

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Abstract

Urban City Traffic Management introduced various remedies to decongest traffic and to reduce the severity of accidents, such as providing traffic signal controls at the intersecting roads at different levels, or grade separating the traffic movement towards different directions. One type of grade separation is Road Underpass or Flyover. The construction of Road Underpass or Flyover poses some doubts whether it is effective or ineffective on the point of views of the travelers or motorists. It is for this reason that this research sought to evaluate the performance and effectiveness of Road Underpass structure on traffic flow at the major intersection, specifically the Wellosefer intersection in Addis Ababa City. The primary data used the existing traffic volume recorded between 7:00 AM – 6:00 PM from Monday to Friday. While the secondary data obtained from the Consulting Office "before" the improvement of Wellosefer intersection, including the previous study, which served as the control analysis for the research. From these data, the analyses provided results on vehicle travel time and delay for a case "before" and "after" improvement of the intersection. SIDRA Software was used to analyze the traffic conditions of the intersection. Based on the findings of the study, a case "before" Improvement of Wellosefer Unsignalized T-Intersection indicated with an average delay of vehicles of about 535.7 seconds, and a travel time of vehicles of about 574.7 seconds. On the other hand, a case "after" Improvement of Wellosefer intersection, three alternatives considered; such as 1) Signalized T-Intersection, 2) Roundabout, and 3) Road Underpass with Roundabout at the upper level. The results of the first alternative showed the Signalized T-intersection indicated an average delay and travel time of 344.3 seconds and 365.0 seconds, respectively. It means, there could be a reduction of 15.4% in average delay if signalized intersection implemented. The second alternative, a case of Roundabout using the same traffic data at current condition, the results indicated the motorists and commuters would be experiencing an average delay of about 355.8 seconds and average travel time of 390.0 seconds. The third alternative considering Road Underpass with Roundabout at the upper level, the results revealed that there was a significant reduction in average delay of vehicles of about 42% from the Unsignalized T-Intersection. Comparing this result with the Signalized intersection using the same traffic data, it showed that there was a significant decrease in average delay. Therefore, the findings of the study, a combination of Road Underpass and Roundabout at the upper level as in the case of Wellosefer intersection performed well than the other traffic control design alternatives.

Published in	American Journal of Traffic and Transportation Engineering (Volume 3, Issue 3)
DOI	10.11648/j.ajtte.20180303.11
Page(s)	41-49
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2018. Published by Science Publishing Group

Keywords

“Before” and “After” Improvement, Flyover, Road Underpass, Traffic Control Design Alternatives, Travel Time & Delay, Traffic Volume, Traffic Conflict, Traffic Congestion

References

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[3]	Amott, R, A. De Palama. (1991). Does Providing Information to Drivers Reduce Congestion, 309-318.
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[8]	Tarekegn K., E. T. Quezon, (2016); Effect Of Cycle Time And Signal Phase On Average Time Delay, Congestion And Level Of Service: A Case Study At Hager Astedader Signalized Intersection in Addis Ababa; IJSER, Vol 7, Issue 10, Pp524-530.
[9]	J. W. Zwarteveen (2011). Urban Traffic Flow Modeling in Addis Ababa.
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[12]	Crawford, J.,. (2011). A Michigan Toolbox for Mitigation, Traffic Congestion. Texas.
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[15]	Yan xing, et. al (2016). Study of Vehicle Delay Based on the Vehicle Arriving Distribution at Entrance Lanes of Intersection. ScienceDirect, Procedia Engineering 137 (2016 ) 599–608.
[16]	István Fi / Zsuzsanna Kovács Igazvölgyi (2014). Travel Time Delay at Pedestrian Crossings Based on Microsimulations. Periodica Polytechnica, Civil Engineering 58/1 (2014) 47–53. doi: 10.3311/PPci.7406 http:// periodicapolytechnica.org/.

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Sentayehu Leleisa, Emer Tucay Quezon, Teyba Wedajo. (2018). Performance Evaluation of Grade Separation Within the Selected Major Intersection in Addis Ababa City. American Journal of Traffic and Transportation Engineering, 3(3), 41-49. https://doi.org/10.11648/j.ajtte.20180303.11

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Sentayehu Leleisa; Emer Tucay Quezon; Teyba Wedajo. Performance Evaluation of Grade Separation Within the Selected Major Intersection in Addis Ababa City. Am. J. Traffic Transp. Eng. 2018, 3(3), 41-49. doi: 10.11648/j.ajtte.20180303.11

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AMA Style

Sentayehu Leleisa, Emer Tucay Quezon, Teyba Wedajo. Performance Evaluation of Grade Separation Within the Selected Major Intersection in Addis Ababa City. Am J Traffic Transp Eng. 2018;3(3):41-49. doi: 10.11648/j.ajtte.20180303.11

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@article{10.11648/j.ajtte.20180303.11,
  author = {Sentayehu Leleisa and Emer Tucay Quezon and Teyba Wedajo},
  title = {Performance Evaluation of Grade Separation Within the Selected Major Intersection in Addis Ababa City},
  journal = {American Journal of Traffic and Transportation Engineering},
  volume = {3},
  number = {3},
  pages = {41-49},
  doi = {10.11648/j.ajtte.20180303.11},
  url = {https://doi.org/10.11648/j.ajtte.20180303.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajtte.20180303.11},
  abstract = {Urban City Traffic Management introduced various remedies to decongest traffic and to reduce the severity of accidents, such as providing traffic signal controls at the intersecting roads at different levels, or grade separating the traffic movement towards different directions. One type of grade separation is Road Underpass or Flyover. The construction of Road Underpass or Flyover poses some doubts whether it is effective or ineffective on the point of views of the travelers or motorists. It is for this reason that this research sought to evaluate the performance and effectiveness of Road Underpass structure on traffic flow at the major intersection, specifically the Wellosefer intersection in Addis Ababa City. The primary data used the existing traffic volume recorded between 7:00 AM – 6:00 PM from Monday to Friday. While the secondary data obtained from the Consulting Office "before" the improvement of Wellosefer intersection, including the previous study, which served as the control analysis for the research. From these data, the analyses provided results on vehicle travel time and delay for a case "before" and "after" improvement of the intersection. SIDRA Software was used to analyze the traffic conditions of the intersection. Based on the findings of the study, a case "before" Improvement of Wellosefer Unsignalized T-Intersection indicated with an average delay of vehicles of about 535.7 seconds, and a travel time of vehicles of about 574.7 seconds. On the other hand, a case "after" Improvement of Wellosefer intersection, three alternatives considered; such as 1) Signalized T-Intersection, 2) Roundabout, and 3) Road Underpass with Roundabout at the upper level. The results of the first alternative showed the Signalized T-intersection indicated an average delay and travel time of 344.3 seconds and 365.0 seconds, respectively. It means, there could be a reduction of 15.4% in average delay if signalized intersection implemented. The second alternative, a case of Roundabout using the same traffic data at current condition, the results indicated the motorists and commuters would be experiencing an average delay of about 355.8 seconds and average travel time of 390.0 seconds. The third alternative considering Road Underpass with Roundabout at the upper level, the results revealed that there was a significant reduction in average delay of vehicles of about 42% from the Unsignalized T-Intersection. Comparing this result with the Signalized intersection using the same traffic data, it showed that there was a significant decrease in average delay. Therefore, the findings of the study, a combination of Road Underpass and Roundabout at the upper level as in the case of Wellosefer intersection performed well than the other traffic control design alternatives.},
 year = {2018}
}

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TY  - JOUR
T1  - Performance Evaluation of Grade Separation Within the Selected Major Intersection in Addis Ababa City
AU  - Sentayehu Leleisa
AU  - Emer Tucay Quezon
AU  - Teyba Wedajo
Y1  - 2018/08/15
PY  - 2018
N1  - https://doi.org/10.11648/j.ajtte.20180303.11
DO  - 10.11648/j.ajtte.20180303.11
T2  - American Journal of Traffic and Transportation Engineering
JF  - American Journal of Traffic and Transportation Engineering
JO  - American Journal of Traffic and Transportation Engineering
SP  - 41
EP  - 49
PB  - Science Publishing Group
SN  - 2578-8604
UR  - https://doi.org/10.11648/j.ajtte.20180303.11
AB  - Urban City Traffic Management introduced various remedies to decongest traffic and to reduce the severity of accidents, such as providing traffic signal controls at the intersecting roads at different levels, or grade separating the traffic movement towards different directions. One type of grade separation is Road Underpass or Flyover. The construction of Road Underpass or Flyover poses some doubts whether it is effective or ineffective on the point of views of the travelers or motorists. It is for this reason that this research sought to evaluate the performance and effectiveness of Road Underpass structure on traffic flow at the major intersection, specifically the Wellosefer intersection in Addis Ababa City. The primary data used the existing traffic volume recorded between 7:00 AM – 6:00 PM from Monday to Friday. While the secondary data obtained from the Consulting Office "before" the improvement of Wellosefer intersection, including the previous study, which served as the control analysis for the research. From these data, the analyses provided results on vehicle travel time and delay for a case "before" and "after" improvement of the intersection. SIDRA Software was used to analyze the traffic conditions of the intersection. Based on the findings of the study, a case "before" Improvement of Wellosefer Unsignalized T-Intersection indicated with an average delay of vehicles of about 535.7 seconds, and a travel time of vehicles of about 574.7 seconds. On the other hand, a case "after" Improvement of Wellosefer intersection, three alternatives considered; such as 1) Signalized T-Intersection, 2) Roundabout, and 3) Road Underpass with Roundabout at the upper level. The results of the first alternative showed the Signalized T-intersection indicated an average delay and travel time of 344.3 seconds and 365.0 seconds, respectively. It means, there could be a reduction of 15.4% in average delay if signalized intersection implemented. The second alternative, a case of Roundabout using the same traffic data at current condition, the results indicated the motorists and commuters would be experiencing an average delay of about 355.8 seconds and average travel time of 390.0 seconds. The third alternative considering Road Underpass with Roundabout at the upper level, the results revealed that there was a significant reduction in average delay of vehicles of about 42% from the Unsignalized T-Intersection. Comparing this result with the Signalized intersection using the same traffic data, it showed that there was a significant decrease in average delay. Therefore, the findings of the study, a combination of Road Underpass and Roundabout at the upper level as in the case of Wellosefer intersection performed well than the other traffic control design alternatives.
VL  - 3
IS  - 3
ER  -

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Author Information

Sentayehu Leleisa

Highway Engineering Stream, Institute of Technology, Dire Dawa University, Dire Dawa, Ethiopia
Emer Tucay Quezon

Department of Civil Engineering, Institute of Technology, Ambo University, Ambo, Ethiopia
Teyba Wedajo

Highway Engineering Stream, Jimma Institute of Technology, Jimma University, Jimma, Ethiopia

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Plain Text BibTeX RIS

APA Style

Sentayehu Leleisa, Emer Tucay Quezon, Teyba Wedajo. (2018). Performance Evaluation of Grade Separation Within the Selected Major Intersection in Addis Ababa City. American Journal of Traffic and Transportation Engineering, 3(3), 41-49. https://doi.org/10.11648/j.ajtte.20180303.11

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ACS Style

Sentayehu Leleisa; Emer Tucay Quezon; Teyba Wedajo. Performance Evaluation of Grade Separation Within the Selected Major Intersection in Addis Ababa City. Am. J. Traffic Transp. Eng. 2018, 3(3), 41-49. doi: 10.11648/j.ajtte.20180303.11

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AMA Style

Sentayehu Leleisa, Emer Tucay Quezon, Teyba Wedajo. Performance Evaluation of Grade Separation Within the Selected Major Intersection in Addis Ababa City. Am J Traffic Transp Eng. 2018;3(3):41-49. doi: 10.11648/j.ajtte.20180303.11

Copy | Download

@article{10.11648/j.ajtte.20180303.11,
  author = {Sentayehu Leleisa and Emer Tucay Quezon and Teyba Wedajo},
  title = {Performance Evaluation of Grade Separation Within the Selected Major Intersection in Addis Ababa City},
  journal = {American Journal of Traffic and Transportation Engineering},
  volume = {3},
  number = {3},
  pages = {41-49},
  doi = {10.11648/j.ajtte.20180303.11},
  url = {https://doi.org/10.11648/j.ajtte.20180303.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajtte.20180303.11},
  abstract = {Urban City Traffic Management introduced various remedies to decongest traffic and to reduce the severity of accidents, such as providing traffic signal controls at the intersecting roads at different levels, or grade separating the traffic movement towards different directions. One type of grade separation is Road Underpass or Flyover. The construction of Road Underpass or Flyover poses some doubts whether it is effective or ineffective on the point of views of the travelers or motorists. It is for this reason that this research sought to evaluate the performance and effectiveness of Road Underpass structure on traffic flow at the major intersection, specifically the Wellosefer intersection in Addis Ababa City. The primary data used the existing traffic volume recorded between 7:00 AM – 6:00 PM from Monday to Friday. While the secondary data obtained from the Consulting Office "before" the improvement of Wellosefer intersection, including the previous study, which served as the control analysis for the research. From these data, the analyses provided results on vehicle travel time and delay for a case "before" and "after" improvement of the intersection. SIDRA Software was used to analyze the traffic conditions of the intersection. Based on the findings of the study, a case "before" Improvement of Wellosefer Unsignalized T-Intersection indicated with an average delay of vehicles of about 535.7 seconds, and a travel time of vehicles of about 574.7 seconds. On the other hand, a case "after" Improvement of Wellosefer intersection, three alternatives considered; such as 1) Signalized T-Intersection, 2) Roundabout, and 3) Road Underpass with Roundabout at the upper level. The results of the first alternative showed the Signalized T-intersection indicated an average delay and travel time of 344.3 seconds and 365.0 seconds, respectively. It means, there could be a reduction of 15.4% in average delay if signalized intersection implemented. The second alternative, a case of Roundabout using the same traffic data at current condition, the results indicated the motorists and commuters would be experiencing an average delay of about 355.8 seconds and average travel time of 390.0 seconds. The third alternative considering Road Underpass with Roundabout at the upper level, the results revealed that there was a significant reduction in average delay of vehicles of about 42% from the Unsignalized T-Intersection. Comparing this result with the Signalized intersection using the same traffic data, it showed that there was a significant decrease in average delay. Therefore, the findings of the study, a combination of Road Underpass and Roundabout at the upper level as in the case of Wellosefer intersection performed well than the other traffic control design alternatives.},
 year = {2018}
}

Copy | Download

TY  - JOUR
T1  - Performance Evaluation of Grade Separation Within the Selected Major Intersection in Addis Ababa City
AU  - Sentayehu Leleisa
AU  - Emer Tucay Quezon
AU  - Teyba Wedajo
Y1  - 2018/08/15
PY  - 2018
N1  - https://doi.org/10.11648/j.ajtte.20180303.11
DO  - 10.11648/j.ajtte.20180303.11
T2  - American Journal of Traffic and Transportation Engineering
JF  - American Journal of Traffic and Transportation Engineering
JO  - American Journal of Traffic and Transportation Engineering
SP  - 41
EP  - 49
PB  - Science Publishing Group
SN  - 2578-8604
UR  - https://doi.org/10.11648/j.ajtte.20180303.11
AB  - Urban City Traffic Management introduced various remedies to decongest traffic and to reduce the severity of accidents, such as providing traffic signal controls at the intersecting roads at different levels, or grade separating the traffic movement towards different directions. One type of grade separation is Road Underpass or Flyover. The construction of Road Underpass or Flyover poses some doubts whether it is effective or ineffective on the point of views of the travelers or motorists. It is for this reason that this research sought to evaluate the performance and effectiveness of Road Underpass structure on traffic flow at the major intersection, specifically the Wellosefer intersection in Addis Ababa City. The primary data used the existing traffic volume recorded between 7:00 AM – 6:00 PM from Monday to Friday. While the secondary data obtained from the Consulting Office "before" the improvement of Wellosefer intersection, including the previous study, which served as the control analysis for the research. From these data, the analyses provided results on vehicle travel time and delay for a case "before" and "after" improvement of the intersection. SIDRA Software was used to analyze the traffic conditions of the intersection. Based on the findings of the study, a case "before" Improvement of Wellosefer Unsignalized T-Intersection indicated with an average delay of vehicles of about 535.7 seconds, and a travel time of vehicles of about 574.7 seconds. On the other hand, a case "after" Improvement of Wellosefer intersection, three alternatives considered; such as 1) Signalized T-Intersection, 2) Roundabout, and 3) Road Underpass with Roundabout at the upper level. The results of the first alternative showed the Signalized T-intersection indicated an average delay and travel time of 344.3 seconds and 365.0 seconds, respectively. It means, there could be a reduction of 15.4% in average delay if signalized intersection implemented. The second alternative, a case of Roundabout using the same traffic data at current condition, the results indicated the motorists and commuters would be experiencing an average delay of about 355.8 seconds and average travel time of 390.0 seconds. The third alternative considering Road Underpass with Roundabout at the upper level, the results revealed that there was a significant reduction in average delay of vehicles of about 42% from the Unsignalized T-Intersection. Comparing this result with the Signalized intersection using the same traffic data, it showed that there was a significant decrease in average delay. Therefore, the findings of the study, a combination of Road Underpass and Roundabout at the upper level as in the case of Wellosefer intersection performed well than the other traffic control design alternatives.
VL  - 3
IS  - 3
ER  -

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