Efficiency Assessment of a Signalized Roundabout and a Traffic Intersection in Baghdad City


  • H. H. Mohammed Department of Civil Engineering, University of Baghdad, Iraq
  • M. Q. Ismail Department of Civil Engineering, University of Baghdad, Iraq
Volume: 11 | Issue: 6 | Pages: 7910-7916 | December 2021 | https://doi.org/10.48084/etasr.4564


In Baghdad city, Iraq, the traffic volumes have rapidly grown during the last 15 years. Road networks need to reevaluate and decide if they are operating properly or not regarding the increase in the number of vehicles. Al-Jadriyah intersection (a four-leg signalized intersection) and Kamal Junblat Square (a multi-lane roundabout), which are two important intersections in Baghdad city with high traffic volumes, were selected to be reevaluated by the SIDRA package in this research. Traffic volume and vehicle movement data were abstracted from videotapes by the Smart Traffic Analyzer (STA) Software. The performance measures include delay and LOS. The analysis results by SIDRA Intersection 8.0.1 show that the performance of the roundabout is better than the signalized intersection but experiences high delay, and low LOS. Therefore, alternatives are proposed to improve the performance for current and future traffic volumes with low-medium delays.


signalized intersection, multi-lane roundabout, RMS delay spread, LOS


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G. Papageorgiou, P. Damianou, A. Pitsilides, A. Thrasos, and P. Ioannou, "A Microscopic Traffic Simulation Model for Transportation Planning in Cyprus," in International Conference on Intelligent Systems And Computing: Theory And Applications, Ayia Napa, Cyprus, Jul. 2006, pp. 157–166.

A. J. Essa, A. Ismail, A. E. Jehad, A. A. Adheem Hussein, A. H. Khalaf, and H. A. M. Yahia, "Development of Roundabout Delay Models Using Traffic Simulation Programs: A Case Study at Al-Mansour City, Iraq," Jurnal Kejuruteraan, vol. 29, no. 2, pp. 97–103, Dec. 2017, https://doi.org/10.17576/jkukm-2017-29(2)-05.

H. A. M. Yahia, S. Safinia, N. K. Al Musharfi, and S. S. I. A. Ali, "Car Driver Attitude towards Road Safety Measures," Jurnal Kejuruteraan, vol. 29, no. 1, pp. 57–61, Oct. 2017, https://doi.org/10.17576/jkukm-2017-29(1)-08.

M. M. Islam and A. Y. S. Al Hadhrami, "Increased motorization and road traffic accidents in Oman," Journal of Emerging Trends in Economics and Management Sciences, vol. 3, no. 6, pp. 907–914, Dec. 2012, https://doi.org/10.10520/EJC130254.

M. Touahmia, "Identification of Risk Factors Influencing Road Traffic Accidents," Engineering, Technology & Applied Science Research, vol. 8, no. 1, pp. 2417–2421, Feb. 2018, https://doi.org/10.48084/etasr.1615.

A. Detho, S. R. Samo, K. C. Mukwana, I. A. Memon, and U. A. Rajput, "Proposed Remedies to Prevent Road Traffic Accidents (RTAs) on Highways in Pakistan," Engineering, Technology & Applied Science Research, vol. 8, no. 5, pp. 3366–3368, Oct. 2018, https://doi.org/10.48084/etasr.2128.

M. Z. Hasanpour, M. R. Ahadi, A. S. Moghadam, and G. A. Behzadi, "Variable Speed Limits: Strategies to Improve Safety and Traffic Parameters for a Bottleneck," Engineering, Technology & Applied Science Research, vol. 7, no. 2, pp. 1535–1539, Apr. 2017, https://doi.org/10.48084/etasr.831.

H. I. M. Irtema, A. Ismail, S. I. Albrka, M. A. Ladin, and H. A. M. Yahia, "Evaluating the Performance of Traffic Flow in Four Intersections and Two Roundabouts in Petaling Jaya and Kuala Lumpur Using Sidra 4.0 Software," Jurnal Teknologi, vol. 72, no. 4, pp. 1–5, Jan. 2015, https://doi.org/10.11113/jt.v72.3906.

M. Owais, O. Abulwafa, and Y. A. Abbas, "When to Decide to Convert a Roundabout to a Signalized Intersection: Simulation Approach for Case Studies in Jeddah and Al-Madinah," Arabian Journal for Science and Engineering, vol. 45, no. 10, pp. 7897–7914, Oct. 2020, https://doi.org/10.1007/s13369-020-04479-6.

P. T. Adeke, A. Etika, and A. A. Atoo, "Capacity and Performance Assessment of Wurukum Roundabout in Makurdi Metropolis: A Comparative Study using ARCADY and SIDRA INTERSECTION Software," Arid Zone Journal of Engineering, Technology and Environment, vol. 16, no. 2, pp. 309–320, Jun. 2020.

H. G. Demir and Y. K. Demir, "A Comparison of Traffic Flow Performance of Roundabouts and Signalized Intersections: A Case Study in Nigde," The Open Transportation Journal, vol. 14, no. 1, pp. 120–132, Jul. 2020, https://doi.org/10.2174/1874447802014010120.

L.-S. Tey, M. S. Salim, S. M. R. Shah, and P. Ranjitkar, "Safety and Operational Performance of Roundabouts," International Journal of Engineering and Advanced Technology, vol. 8, no. 6S3, pp. 198–203, Nov. 2019, https://doi.org/10.35940/ijeat.F1032.0986S319.

G. M. Aboud, A. M. Abdulwahab, Q. S. Banyhussan, and H. A. Zubaidi, "A Case Study on Roundabout under Congestion: Proposal to Improve Current Traffic Operation," Civil Engineering Journal, vol. 5, no. 9, pp. 2029–2040, Sep. 2019, https://doi.org/10.28991/cej-2019-03091391.

J. Mohammed and A. A. M. D. O. Ali, "Traffic Flow Analysis for Intersection Using Computer Simulation Aasidra Software: A Case Study in Bangi Malaysia," Tikrit Journal of Engineering Sciences, vol. 20, no. 4, pp. 10–25, May 2014.

M. M. Akmaz and O. N. Celik, "Examination of Signalized Intersections According to Australian and HCM (Highway Capacity Manual) Methods Using Sidra Intersection Software," Journal of Civil Engineering and Architecture, vol. 10, no. 2, pp. 246–259, Feb. 2016, https://doi.org/10.17265/1934-7359/2016.02.013.

G. Sofia, A. Al-Haddad, and I. S. Al-Haydari, "Improvement of traffic performance at intersections in Karbala city," MATEC Web of Conferences, vol. 162, 2018, Art. no. 01032, https://doi.org/10.1051/matecconf/201816201032.

M. K. Al-Obaidi, "Enhancement of the Traffic Operation Performance of Al-Mansour Signalized T-Intersection in Baghdad City," Association of Arab Universities Journal of Engineering Sciences, vol. 25, no. 5, pp. 190–210, 2018.

M. Q. Ismael and A. J. Mohammed, "Improvement of Traffic Movement for Roads Network in Al-Kadhimiya City Center," Journal of Engineering, vol. 22, no. 9, pp. 182–205, Sep. 2016.

L. J. Pignataro and E. J. Cantilli, Traffic Engineering: Theory and Practice. Hoboken, NJ, USA: Prentice-Hall, 1973.

National Cooperative Highway Research Program, Roundabouts: An Informational Guide, Second Edition., no. Report 672. Washington, DC, USA: Transportation Research Board, 2010.

Federal Highway Administration, Roundabouts : an informational guide, no. FHWA-RD-00-067; Washington, DC, USA: US Department of Transportation, 2000.

M. R. Haque, M. A. Rahman, M. B. Hossain, and M. Roknuzzaman, "Capacity Evaluation of Roundabout Intersections in Khulna Metropolitan City by Using SIDRA," in International Conference on Planning, Architecture and Civil Engineering, Rajshahi, Bangladesh, Feb. 2017, Art. no. 6.

HCM, Highway Capacity Manual 2010. Washington, DC, USA: Transportation Research Board, 2010.

Traffic Modelling Guidelines: SIDRA Intersection. Adelaide, SA, Australia: Department for Infrastructure and Transport, 2021.

X. Chen, D. Li, N. Ma, and C. Shao, "Prediction of User Perceptions of Signalized Intersection Level of Service Based on Fuzzy Neural Networks," Transportation Research Record, vol. 2130, no. 1, pp. 7–15, Jan. 2009, https://doi.org/10.3141/2130-02.


How to Cite

H. H. Mohammed and M. Q. Ismail, “Efficiency Assessment of a Signalized Roundabout and a Traffic Intersection in Baghdad City”, Eng. Technol. Appl. Sci. Res., vol. 11, no. 6, pp. 7910–7916, Dec. 2021.


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