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Reza Pahlevi Munirwan
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INDONESIA
Disaster in Civil Engineering and Architecture
ISSN : -     EISSN : 3089722X     DOI : https://doi.org/10.70028/dcea
Disaster in Civil Engineering and Architecture is an international, peer-reviewed, gold open-access journal. It covers both natural and man-made events that severely affect infrastructure, buildings, and the environment. The journal emphasizes the importance of resilient design, thorough planning, and effective management to reduce loss of life, economic damage, and societal disruption. Disaster in Civil Engineering and Architecture is dedicated to providing a rapid publication platform for impactful research worldwide. The journal upholds the quality and integrity of published work through a rigorous peer-review process. Disaster in Civil Engineering and Architecture invites submissions of research papers, case reports, and review studies. The journal is published twice a year, in April and October. Disaster in Civil Engineering and Architecture features an Editorial Board composed of specialists across various fields, ensuring that reviews are prompt, fair, and conducted by experts in all relevant sub-disciplines of the journal.
Articles 31 Documents
Determination of Follow-Up Headway of Local Drivers at Urban Multilane Roundabouts in Gombe Metropolis Abubakar Baraya; Ahmad Batari; Muttaka Na'iya Ibrahim
Disaster in Civil Engineering and Architecture Vol. 3 No. 2: October 2026
Publisher : Popular Scientist

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70028/dcea.v3i2.121

Abstract

Accurate estimation of follow-up headway is fundamental for the operational analysis of urban roundabouts, especially in regions with heterogeneous traffic. This study presents a field-based approach to determining follow-up headway at three typical multilane roundabouts in Gombe metropolis, Nigeria, utilizing unmanned aerial vehicle (UAV) video surveys and rigorous manual data extraction. The 50th percentile method was applied to determine operational headway values for each roundabout. The results indicate a mean follow-up headway of 2.01 seconds, with site-specific values of 2.02 seconds (Central Roundabout), 2.20 seconds (Dukku Park Roundabout), and 1.80 seconds (Union Bank Roundabout), reflecting the combined influence of local geometry, driver behavior, and traffic composition. Variability between the sites highlights the importance of local context, as geometric complexity and the traffic characteristics affect headway selection. These findings reinforce the limitations of adopting foreign default values for capacity analysis in Nigerian settings. The study recommends adopting locally measured parameters in the capacity analysis of roundabouts with simulation and analytical tools such as the Highway Capacity Manual Models. The empirical results provide evidence-based direction for roundabout design and policy in rapidly urbanizing African cities.

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