Urban intersections are critical locations in road network where vehicular traffic and pedestrians interact. It results in substandard safety performance due to geometric deficiencies. Traditional safety evaluations depend on historical records solely which suffers systematic under reporting and provide are active frame work. This study used a reactive proactive approach by integrating historical crash data analysis with microscopic traffic simulations and surrogate safety measures (SSMs) to evaluate five high risk intersections in Yeka sub city Addis Ababa. Kotebe K/mihret, kotebe Zero hulet, Kotebe College, Abem and Kara junctions. Intersections were screened and prioritized using the equivalent property damage only (EPDO) scoring method. A microscopic simulation was developed using SUMO and trajectories were analyzed using the surrogate safety assessment model (SSAM) to capture time to collision (TTC) and post encroachment time (PET). Based on identified deficiencies engineering interventions are proposed following AACRA, ERA and AASHTO design standards. The post redesign SSAM evaluation revealed a 36.9% overall reduction in total traffic conflicts. This confirmed that integrating historical crashes with proactive surrogate measures creates a more robust framework for urban traffic safety management. This study concluded that for evaluating urban intersection safety, integrating historical crash analysis with surrogate conflict measures provide more comprehensive and reliable frame work than relying on historical crash records solely.
| Published in | American Journal of Traffic and Transportation Engineering (Volume 11, Issue 4) |
| DOI | 10.11648/j.ajtte.20261104.12 |
| Page(s) | 67-74 |
| 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), 2026. Published by Science Publishing Group |
Traffic Safety, Crash Data Analysis, Crash Severity, SUMO-SSAM Simulation, Traffic Conflict Analysis, Surrogate Safety Measures
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APA Style
Zemene, E. (2026). Safety Evaluation of Selected Intersections Using Historical Crash Data and Surrogate Traffic Conflict Measures - the Case of Yeka Sub City Addis Ababa. American Journal of Traffic and Transportation Engineering, 11(4), 67-74. https://doi.org/10.11648/j.ajtte.20261104.12
ACS Style
Zemene, E. Safety Evaluation of Selected Intersections Using Historical Crash Data and Surrogate Traffic Conflict Measures - the Case of Yeka Sub City Addis Ababa. Am. J. Traffic Transp. Eng. 2026, 11(4), 67-74. doi: 10.11648/j.ajtte.20261104.12
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Download@article{10.11648/j.ajtte.20261104.12,
author = {Endalkachew Zemene},
title = {Safety Evaluation of Selected Intersections Using Historical Crash Data and Surrogate Traffic Conflict Measures - the Case of Yeka Sub City Addis Ababa},
journal = {American Journal of Traffic and Transportation Engineering},
volume = {11},
number = {4},
pages = {67-74},
doi = {10.11648/j.ajtte.20261104.12},
url = {https://doi.org/10.11648/j.ajtte.20261104.12},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajtte.20261104.12},
abstract = {Urban intersections are critical locations in road network where vehicular traffic and pedestrians interact. It results in substandard safety performance due to geometric deficiencies. Traditional safety evaluations depend on historical records solely which suffers systematic under reporting and provide are active frame work. This study used a reactive proactive approach by integrating historical crash data analysis with microscopic traffic simulations and surrogate safety measures (SSMs) to evaluate five high risk intersections in Yeka sub city Addis Ababa. Kotebe K/mihret, kotebe Zero hulet, Kotebe College, Abem and Kara junctions. Intersections were screened and prioritized using the equivalent property damage only (EPDO) scoring method. A microscopic simulation was developed using SUMO and trajectories were analyzed using the surrogate safety assessment model (SSAM) to capture time to collision (TTC) and post encroachment time (PET). Based on identified deficiencies engineering interventions are proposed following AACRA, ERA and AASHTO design standards. The post redesign SSAM evaluation revealed a 36.9% overall reduction in total traffic conflicts. This confirmed that integrating historical crashes with proactive surrogate measures creates a more robust framework for urban traffic safety management. This study concluded that for evaluating urban intersection safety, integrating historical crash analysis with surrogate conflict measures provide more comprehensive and reliable frame work than relying on historical crash records solely.},
year = {2026}
}
TY - JOUR T1 - Safety Evaluation of Selected Intersections Using Historical Crash Data and Surrogate Traffic Conflict Measures - the Case of Yeka Sub City Addis Ababa AU - Endalkachew Zemene Y1 - 2026/08/24 PY - 2026 N1 - https://doi.org/10.11648/j.ajtte.20261104.12 DO - 10.11648/j.ajtte.20261104.12 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 - 67 EP - 74 PB - Science Publishing Group SN - 2578-8604 UR - https://doi.org/10.11648/j.ajtte.20261104.12 AB - Urban intersections are critical locations in road network where vehicular traffic and pedestrians interact. It results in substandard safety performance due to geometric deficiencies. Traditional safety evaluations depend on historical records solely which suffers systematic under reporting and provide are active frame work. This study used a reactive proactive approach by integrating historical crash data analysis with microscopic traffic simulations and surrogate safety measures (SSMs) to evaluate five high risk intersections in Yeka sub city Addis Ababa. Kotebe K/mihret, kotebe Zero hulet, Kotebe College, Abem and Kara junctions. Intersections were screened and prioritized using the equivalent property damage only (EPDO) scoring method. A microscopic simulation was developed using SUMO and trajectories were analyzed using the surrogate safety assessment model (SSAM) to capture time to collision (TTC) and post encroachment time (PET). Based on identified deficiencies engineering interventions are proposed following AACRA, ERA and AASHTO design standards. The post redesign SSAM evaluation revealed a 36.9% overall reduction in total traffic conflicts. This confirmed that integrating historical crashes with proactive surrogate measures creates a more robust framework for urban traffic safety management. This study concluded that for evaluating urban intersection safety, integrating historical crash analysis with surrogate conflict measures provide more comprehensive and reliable frame work than relying on historical crash records solely. VL - 11 IS - 4 ER -
Department of Civil Engineering & College of Engineering, Addis Ababa Science and Technology University, Addis Ababa, Ethiopia
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