Research Article
Assessment of How Multimodal and Geometric Improvements Reduce Road-Crash Frequency on the 18 Mazoria-Ashewa Meda Corridor
Rehima Aman Bedewi*
,
Tefera Bahiru
Issue:
Volume 11, Issue 4, August 2026
Pages:
61-66
Received:
23 July 2026
Accepted:
5 August 2026
Published:
22 August 2026
DOI:
10.11648/j.ajtte.20261104.11
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Abstract: Road traffic crashes represent a critical public health and safety concern in rapidly urbanizing regions across Ethiopia, mainly affecting vulnerable road users. This study assesses the safety impacts of proposed multimodal and geometric corridor development interventions along the high traffic 18 Mazoria-Ashewa Meda Corridor in Addis Ababa. Using a mixed-methods, historical crash data across 12 equal segments (500m length), field observations, regression modeling and stakeholder perception surveys were analyzed. The assessments revealed severe infrastructure deficiency: 83.3% of segments lacked continuous walkways and 100% lacked dedicated bike lanes and bus bays. Major junctions were strongly correlated with crash severity (r=0.688, p=0.013). multiple regression modeling confirmed major junctions as the dominant predictor of the Weighted Severity Index (B=40.214, p=0.02). Segment 11 (Kidanemihret roundabout) emerged as the primary blackspot (Crash Frequency (CF)=36, representing 31.3% of total crashes) due to steep gradient (~7%) and substandard geometry. Given the absence of post-intervention crash data and data limitation, Crash Modification Factors (CMFS) from the FHWA Clearinghouse and the Highway Safety Manual (HSM) were applied to project safety benefits. The projected interventions demonstrate expected reductions of 32% for dedicated bike lanes (CMF=0.68), 65% for continuous walkways (CMF=0.35), 44% for right-turn geometry modification (CMF=0.558), and 68% for left-turn/ U-turn geometry prohibitions (CMF=0.32). The hazardous Kidanemihret roundabout redesigned into a priority junction to eliminate heavy vehicle rollover risks on steep gradients. Statical evidence, CMF projections and stakeholder perceptions collectively indicate that the interventions will improve road safety.
Abstract: Road traffic crashes represent a critical public health and safety concern in rapidly urbanizing regions across Ethiopia, mainly affecting vulnerable road users. This study assesses the safety impacts of proposed multimodal and geometric corridor development interventions along the high traffic 18 Mazoria-Ashewa Meda Corridor in Addis Ababa. Using ...
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Research Article
Safety Evaluation of Selected Intersections Using Historical Crash Data and Surrogate Traffic Conflict Measures - the Case of Yeka Sub City Addis Ababa
Endalkchew Zemene*
Issue:
Volume 11, Issue 4, August 2026
Pages:
67-74
Received:
23 July 2026
Accepted:
5 August 2026
Published:
24 August 2026
DOI:
10.11648/j.ajtte.20261104.12
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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.
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 reac...
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Research Article
Pedestrian Gap Acceptance Behavior at Road Mid-Block Crossings in Bahir Dar City
Abebe Sewunet Andargie*,
Girma Berhanu Bezabeh
Issue:
Volume 11, Issue 4, August 2026
Pages:
75-81
Received:
22 June 2026
Accepted:
20 July 2026
Published:
24 August 2026
DOI:
10.11648/j.ajtte.20261104.13
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Abstract: Walking accounts for the dominant share over other modes of transport in Ethiopia. In the course of walking from place to place in built-up areas, pedestrians cross road-traffic streams that pose a risk of road crash fatalities and injuries. Pedestrian’s crossing behavior and the risk of pedestrian crashes vary with various factors including pedestrians’ physical and mental states, safety awareness, and socioeconomic characteristics as well as the adequacy of road crossing facilities. The aim of this research is to investigate and model the gap acceptance behavior of pedestrians at road mid-block crossings in Bahir Dar City. A field survey was carried out at four road mid-block pedestrian crossing locations on different streets of Bahir Dar city. Pedestrian crossings were videotaped in real traffic conditions and variables of pedestrian characteristics and their road crossing behaviors, vehicular and roadway characteristics were extracted using playback technique with AVS Video Editor Software and analyzed using SPSS-20. The statistical analysis of the combined data resulted in critical (50th percentile) and 85th percentile accepted gaps of 5.0 seconds and 7.2 seconds to cross at road mid-blocks, respectively. Multiple linear regression (MLR) and binary logistic regression (BLR) analyses showed pedestrian road crossing behavior as the main factor for both pedestrian gap acceptance and crossing decision compared to driver, roadway, and vehicular characteristics.
Abstract: Walking accounts for the dominant share over other modes of transport in Ethiopia. In the course of walking from place to place in built-up areas, pedestrians cross road-traffic streams that pose a risk of road crash fatalities and injuries. Pedestrian’s crossing behavior and the risk of pedestrian crashes vary with various factors including pedest...
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