Determination of Passenger Car Unit for Urban Roads: A Case Study in Addis Ababa

Helen Hordofa Tullu; Emer Tucay Quezon

doi:doi:10.11648/j.ajcbm.20210502.13

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Determination of Passenger Car Unit for Urban Roads: A Case Study in Addis Ababa

Helen Hordofa Tullu, Emer Tucay Quezon

Published in American Journal of Construction and Building Materials (Volume 5, Issue 2)

Received: 8 June 2020 Accepted: 15 June 2021 Published: 6 September 2021

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Abstract

In Ethiopia, specifically on Addis Ababa city roads operating, vehicles are mixed with varying static and dynamic traffic characteristics that are very challenging for the traffic analyst to come up with a sole solution to the traffic malady. Under heterogeneous traffic, each vehicle type cannot be compared with other vehicle types since it shows different effects on the road. It could be observed that the majority of the drivers in Addis Ababa road networks do not follow proper lane discipline to use any available space on the road sections. Currently, Ethiopia is using the passenger car unit values from other countries manual, which doesn't represent the local traffic and roadway conditions. This study was initiated to establish the PCU values that will cater the local settings. Hence, this study was focused on estimating the PCU values of multilane highways in Addis Ababa city and determining the influence of traffic volume and width of the road on the values of PCU. The PCUs were estimated for four vehicle types based on the variation of traffic volume and carriageway width. Dynamic PCU method was used to determine PCU values, and a linear regression analysis was performed for model development. The developed model is used to estimate PCU values having the same traffic conditions and roadway conditions found in other countries. The study results indicated that as the traffic volume and carriageway width increases, the passenger car unit value also increases. Also, it was found out that the results of PCU values in this study showed higher values than those provided in Highway Capacity Manual (HCM). Hence, the PCU values obtained are recommended to reflect the existing traffic condition in the locality.

Published in	American Journal of Construction and Building Materials (Volume 5, Issue 2)
DOI	10.11648/j.ajcbm.20210502.13
Page(s)	57-63
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), 2021. Published by Science Publishing Group

Keywords

Passenger Car Unit, Dynamic PCU, Traffic Volume, Carriageway Width, Regression Analysis

References

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[2]	Mehar, A., S. Chandra, and S. Velmurugan. "Passenger Car Units at Different Levels of Service for Capacity Analysis of Multilane Interurban Highways in India." Journal of Transportation Engineering, January 2014: 81-88.
[3]	West, James E., and Glens Thurgood. "Developing Passenger-Car Equivalents for left-turning trucks at a compressed diamond interchange." transportation research record 1484, n.d.: 90-97.
[4]	M. Rahman and F. Nakamura. "Measuring passenger car equivalent for no-motorized vehicles (rickshaws) at mid-block sections." journal of the eastern Asia society for transportation studies, Vol, 6, 2005: 119-126.
[5]	Sarraj, Yahya. "Passenger Car Equivalents at Signalized Intersections for Heavy and Medium Trucks and Animal Driven Carts in Gaza, Palestine." International Journal of Emerging Technology and Advanced Engineering, 2014: 80-88.
[6]	Gani, Fadly Arirja, Toshio Yoshii, and Shinya Kurauchi. "Estimation of Dynamic Value of Passenger Car Unit in the Mixed Traffic." Journal of the Eastern Asia Society for Transportation Studies 12 (2017): 1666-1675.
[7]	Olwan, Fatema Khames. Passenger Car Equivalent for Motorcycles and Three-wheelers at Signalized intersection in Gaza City, Palestine. 2017.
[8]	Aggarwal, Praveen. "Passenger Car Unit Value for Trucks using Fuzzy model." Proceedings of the World Congress on Engineering 2 (2011).
[9]	P. Roess, Roger, Elena S. Prassa, and William R. Mcshane. Traffic engineering. Third edition. Upper Saddle River, New Jersey 07458: Pearson Education, Inc, 2004.
[10]	Mondal, Satyajit, Sandip Chakraborty, Sudip Kumar Roy, and Ankit Gupta. "capacity and dynamic passenger car unit estimation for heterogeneous traffic stream of urban arterials: a case study of indian metropolis." Semantics Scholar. 2016. https://pdfs.semanticscholar.org/a2bb/c48dd6b13e1603dae24594d6f791c51a94d6.pdf (accessed 1 13, 2020).
[11]	N, M. Mardani, S. Chandra, and I. Ghosh. "Passenger Car Unit of Vehicles on Undivided Intercity Roads in India." Procedia Computer Science, 2015: 926-936.
[12]	Ethiopian road authority ERA. "pavement design manual." Vol. Volume I. 2013.
[13]	Tadesse, Firehun. Analysis of capacity and traffic flow characteristics of mixed traffic on addis ababa ring road. Addis ababa, march, 2019.
[14]	Chandra, S., and P. K. Sikdar. "Factors affecting PCU in mixed traffic situations on urban roads." Road & Transport Research 9, no. 3 (2000): 40-50.
[15]	Highway Capacity Manual. uninterupted flow. washington: TRANSPORTATION RESEARCH BOARD, 2010.

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APA Style

Helen Hordofa Tullu, Emer Tucay Quezon. (2021). Determination of Passenger Car Unit for Urban Roads: A Case Study in Addis Ababa. American Journal of Construction and Building Materials, 5(2), 57-63. https://doi.org/10.11648/j.ajcbm.20210502.13

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ACS Style

Helen Hordofa Tullu; Emer Tucay Quezon. Determination of Passenger Car Unit for Urban Roads: A Case Study in Addis Ababa. Am. J. Constr. Build. Mater. 2021, 5(2), 57-63. doi: 10.11648/j.ajcbm.20210502.13

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AMA Style

Helen Hordofa Tullu, Emer Tucay Quezon. Determination of Passenger Car Unit for Urban Roads: A Case Study in Addis Ababa. Am J Constr Build Mater. 2021;5(2):57-63. doi: 10.11648/j.ajcbm.20210502.13

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@article{10.11648/j.ajcbm.20210502.13,
  author = {Helen Hordofa Tullu and Emer Tucay Quezon},
  title = {Determination of Passenger Car Unit for Urban Roads: A Case Study in Addis Ababa},
  journal = {American Journal of Construction and Building Materials},
  volume = {5},
  number = {2},
  pages = {57-63},
  doi = {10.11648/j.ajcbm.20210502.13},
  url = {https://doi.org/10.11648/j.ajcbm.20210502.13},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajcbm.20210502.13},
  abstract = {In Ethiopia, specifically on Addis Ababa city roads operating, vehicles are mixed with varying static and dynamic traffic characteristics that are very challenging for the traffic analyst to come up with a sole solution to the traffic malady. Under heterogeneous traffic, each vehicle type cannot be compared with other vehicle types since it shows different effects on the road. It could be observed that the majority of the drivers in Addis Ababa road networks do not follow proper lane discipline to use any available space on the road sections. Currently, Ethiopia is using the passenger car unit values from other countries manual, which doesn't represent the local traffic and roadway conditions. This study was initiated to establish the PCU values that will cater the local settings. Hence, this study was focused on estimating the PCU values of multilane highways in Addis Ababa city and determining the influence of traffic volume and width of the road on the values of PCU. The PCUs were estimated for four vehicle types based on the variation of traffic volume and carriageway width. Dynamic PCU method was used to determine PCU values, and a linear regression analysis was performed for model development. The developed model is used to estimate PCU values having the same traffic conditions and roadway conditions found in other countries. The study results indicated that as the traffic volume and carriageway width increases, the passenger car unit value also increases. Also, it was found out that the results of PCU values in this study showed higher values than those provided in Highway Capacity Manual (HCM). Hence, the PCU values obtained are recommended to reflect the existing traffic condition in the locality.},
 year = {2021}
}

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TY - JOUR
T1 - Determination of Passenger Car Unit for Urban Roads: A Case Study in Addis Ababa
AU - Helen Hordofa Tullu
AU - Emer Tucay Quezon
Y1 - 2021/09/06
PY - 2021
N1 - https://doi.org/10.11648/j.ajcbm.20210502.13
DO - 10.11648/j.ajcbm.20210502.13
T2 - American Journal of Construction and Building Materials
JF - American Journal of Construction and Building Materials
JO - American Journal of Construction and Building Materials
SP - 57
EP - 63
PB - Science Publishing Group
SN - 2640-0057
UR - https://doi.org/10.11648/j.ajcbm.20210502.13
AB - In Ethiopia, specifically on Addis Ababa city roads operating, vehicles are mixed with varying static and dynamic traffic characteristics that are very challenging for the traffic analyst to come up with a sole solution to the traffic malady. Under heterogeneous traffic, each vehicle type cannot be compared with other vehicle types since it shows different effects on the road. It could be observed that the majority of the drivers in Addis Ababa road networks do not follow proper lane discipline to use any available space on the road sections. Currently, Ethiopia is using the passenger car unit values from other countries manual, which doesn't represent the local traffic and roadway conditions. This study was initiated to establish the PCU values that will cater the local settings. Hence, this study was focused on estimating the PCU values of multilane highways in Addis Ababa city and determining the influence of traffic volume and width of the road on the values of PCU. The PCUs were estimated for four vehicle types based on the variation of traffic volume and carriageway width. Dynamic PCU method was used to determine PCU values, and a linear regression analysis was performed for model development. The developed model is used to estimate PCU values having the same traffic conditions and roadway conditions found in other countries. The study results indicated that as the traffic volume and carriageway width increases, the passenger car unit value also increases. Also, it was found out that the results of PCU values in this study showed higher values than those provided in Highway Capacity Manual (HCM). Hence, the PCU values obtained are recommended to reflect the existing traffic condition in the locality.
VL - 5
IS - 2
ER -

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Author Information

Helen Hordofa Tullu

Road and Transport Engineering, College of Civil and Architecture Engineering Addis Ababa Science and Technology University, Addis Ababa, Ethiopia
Emer Tucay Quezon

Civil & Construction Engineering and Management Streams, Ambo Institute of Technology, Ambo University, Ambo, Ethiopia

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APA Style

Helen Hordofa Tullu, Emer Tucay Quezon. (2021). Determination of Passenger Car Unit for Urban Roads: A Case Study in Addis Ababa. American Journal of Construction and Building Materials, 5(2), 57-63. https://doi.org/10.11648/j.ajcbm.20210502.13

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ACS Style

Helen Hordofa Tullu; Emer Tucay Quezon. Determination of Passenger Car Unit for Urban Roads: A Case Study in Addis Ababa. Am. J. Constr. Build. Mater. 2021, 5(2), 57-63. doi: 10.11648/j.ajcbm.20210502.13

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AMA Style

Helen Hordofa Tullu, Emer Tucay Quezon. Determination of Passenger Car Unit for Urban Roads: A Case Study in Addis Ababa. Am J Constr Build Mater. 2021;5(2):57-63. doi: 10.11648/j.ajcbm.20210502.13

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@article{10.11648/j.ajcbm.20210502.13,
  author = {Helen Hordofa Tullu and Emer Tucay Quezon},
  title = {Determination of Passenger Car Unit for Urban Roads: A Case Study in Addis Ababa},
  journal = {American Journal of Construction and Building Materials},
  volume = {5},
  number = {2},
  pages = {57-63},
  doi = {10.11648/j.ajcbm.20210502.13},
  url = {https://doi.org/10.11648/j.ajcbm.20210502.13},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajcbm.20210502.13},
  abstract = {In Ethiopia, specifically on Addis Ababa city roads operating, vehicles are mixed with varying static and dynamic traffic characteristics that are very challenging for the traffic analyst to come up with a sole solution to the traffic malady. Under heterogeneous traffic, each vehicle type cannot be compared with other vehicle types since it shows different effects on the road. It could be observed that the majority of the drivers in Addis Ababa road networks do not follow proper lane discipline to use any available space on the road sections. Currently, Ethiopia is using the passenger car unit values from other countries manual, which doesn't represent the local traffic and roadway conditions. This study was initiated to establish the PCU values that will cater the local settings. Hence, this study was focused on estimating the PCU values of multilane highways in Addis Ababa city and determining the influence of traffic volume and width of the road on the values of PCU. The PCUs were estimated for four vehicle types based on the variation of traffic volume and carriageway width. Dynamic PCU method was used to determine PCU values, and a linear regression analysis was performed for model development. The developed model is used to estimate PCU values having the same traffic conditions and roadway conditions found in other countries. The study results indicated that as the traffic volume and carriageway width increases, the passenger car unit value also increases. Also, it was found out that the results of PCU values in this study showed higher values than those provided in Highway Capacity Manual (HCM). Hence, the PCU values obtained are recommended to reflect the existing traffic condition in the locality.},
 year = {2021}
}

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