African Transport Studies最新文献

{"title":"Spatio-temporal assessment of polluting emissions from transport commuting in Kenya: The first step to inform mitigation strategies","authors":"Rafael Arevalo-Ascanio ,&nbsp;Alex Kipkorir Koech","doi":"10.1016/j.aftran.2025.100056","DOIUrl":"10.1016/j.aftran.2025.100056","url":null,"abstract":"<div><div>Transport decarbonization is part of global efforts to combat climate change. Urban growth and the increasing need for commuting contribute to emissions that harm both the environment and public health. In the Global South, commuting operations are predominantly characterized by (in)formal <em>paratransit</em> systems, which rely on outdated, less environmentally efficient vehicles. This paper assesses the emissions of CO₂, NOx, CO, and PM_2.5 exhaust in a congested commuting corridor within the Nairobi metropolitan region to identify where and when mitigation strategies should be prioritized. The emissions calculation methodology follows an activity-based approach, incorporating distance travelled and vehicle operational parameters as a function of travel speed. Due to the lack of formal transport operation data, the study relies on empirical data collection through counting and observation of commuting events along the corridor. The results reveal spatio-temporal dependencies, with higher emission levels observed during peak hours and in areas closer to the city centre. Emissions patterns reflect the intensity of operations, with increased frequency and duration of commuting trips leading to greater environmental impacts. These findings should inform public policy development aimed at reducing pollutant emissions. Similarly, decarbonization strategies, such as vehicle electrification, should focus on the most polluted time windows and corridor segments.</div></div>","PeriodicalId":100058,"journal":{"name":"African Transport Studies","volume":"3 ","pages":"Article 100056"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144657255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Accessibility planning: Overlooked or absent by design in medium-term development plans? A catalog of the policy orientations for 52 diverse municipalities in Ghana","authors":"Justice P. Tuffour ,&nbsp;Jones Adu-Mensah ,&nbsp;Tracy Morrison ,&nbsp;Ransmond Opoku Berchie","doi":"10.1016/j.aftran.2024.100015","DOIUrl":"10.1016/j.aftran.2024.100015","url":null,"abstract":"<div><div>Metrics for cataloging regional transportation planning success are quickly evolving from the business-as-usual mobility measures like roadway level of service towards more sustainable accessibility indicators. Indicators that connect people to opportunities. While this conventional shift gains momentum in modern planning, the exhibition of accessibility planning strategies appear to be a hit-or-miss endeavor – either supplanted by the age-old \"build first, make amends later\" paradigm or vaguely referenced in policy documents. This rhetoric of mobility <em>versus</em> accessibility-centered planning <em>(which we call AVM orientation)</em> and its application often grapples with uncertainties and remains inconsistent in many developing regions, limiting a clearer understanding of their current planning orientation. Our paper addresses this gap by using normalized accessibility score indexing to capture the orientation and integration of accessibility planning for 52 diverse municipalities in Ghana. By syllogizing data from the most recent medium-term development plans of selected Metropolitan, Municipal, and District assemblies (MMDAs) nationwide and the National Transportation Policy framework, the study examines the current planning orientations, gaps in performance measures, and policy directions for adopting more sustainable metrics. We find that development planning only loosely acknowledges the principles of accessibility planning, often using performance metrics incongruent with conventional sustainable outcomes. Less than a third of MTDPs include any land use and transportation integration measures, and fewer still account for vehicle miles traveled (VMT) reduction. Among the MMDAs that capture accessibility goals, development strategies still prioritize road infrastructure expansion, especially evident in small-sized Districts where the underdeveloped transportation network necessitates these prerequisite measures. The paper discusses implications for planning policy and practice while offering recommendations for bridging the crossroads for accessibility in long-range development planning.</div></div>","PeriodicalId":100058,"journal":{"name":"African Transport Studies","volume":"3 ","pages":"Article 100015"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of injury severity levels and contributory factors in traffic crashes at signalized intersections under mixed traffic conditions in a low- and middle-income country","authors":"John H. Kodi ,&nbsp;Evans Msaki ,&nbsp;Angela E. Kitali ,&nbsp;Henrick J. Haule ,&nbsp;Sultan Ali","doi":"10.1016/j.aftran.2024.100019","DOIUrl":"10.1016/j.aftran.2024.100019","url":null,"abstract":"<div><div>Traffic crashes are more likely to occur at intersections due to the complex nature of the traffic movement. This study explored the relationship between the injury severity outcome of intersection-related crashes and the contributing factors such as roadway, environmental, temporal, traffic, and land use characteristics. The analysis was based on five years (2016–2020) of three-legged and four-legged intersection-related crashes in Dar es Salaam, Tanzania. The study used a hybrid approach combining the latent class cluster analysis (LCA) and a logistic regression model in analyzing the injury severity of intersection-related crashes. Three clusters were identified for the three-legged intersection crashes based on traffic volume, lane width, number of lanes, and median type. For four-legged intersections, three clusters were identified based on land use, lane width, and time of the day. A logistic model was developed to identify factors contributing to the injury severity of intersection-related crashes. The results indicated that adverse weather conditions were associated with a lower likelihood of fatal/severe injury for both three-legged and four-legged intersections in the whole dataset and each specific cluster. This study provides an insightful understanding of the effects of these variables on the severity of intersection-related crashes and beneficial references for developing effective countermeasures for severe crash prevention. Also, the results of this study can help developing nations like Tanzania develop a strategic safety plan focusing on improving safety across all signalized intersections.</div></div>","PeriodicalId":100058,"journal":{"name":"African Transport Studies","volume":"3 ","pages":"Article 100019"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Using commercial floating car data to remotely infer the presence of potholes along rural road segments","authors":"Megan M. Bruwer,&nbsp;S.J. Andersen","doi":"10.1016/j.aftran.2024.100017","DOIUrl":"10.1016/j.aftran.2024.100017","url":null,"abstract":"<div><div>Potholes contribute to crashes, cause extensive damage to vehicles, and lead to further deterioration of road infrastructure. Remote detection of potholes is of great interest to travelers wishing to avoid pothole riddled routes, and to roads authorities for timeous protection of infrastructure. This study developed a method that can automatically and remotely infer that potholes exist along road segments using readily available traffic data. A simple <em>Pothole Occurrence Probability (POP) Model</em> is proposed that uses only commercial floating car data (FCD) as input. Commercial FCD are anonymized, widespread, and passively collected by GPS enabled devices, making FCD particularly appropriate for input to remote traffic monitoring. The application of FCD to infer pothole presence is unique and has not been previously investigated. Pothole presence is shown in this paper to significantly impact harmonic mean speeds reported by FCD along rural roads in South Africa. The relationship between pothole severity, evaluated from test-vehicle GPS data and dashboard-camera footage, and FCD-reported speed profiles, were empirically investigated along 69 km of training routes to develop the <em>POP Model</em>. The model was evaluated along six testing routes, with a total length of 189 km. 85 % of the testing routes were correctly categorized as either having or not having potholes, while 96 % of potholed road segments were correctly identified. The <em>POP Model</em> has wide application potential, firstly as input to navigation applications for travelers, and secondly through incorporation into pavement management systems to continuously monitor vast rural road networks.</div></div>","PeriodicalId":100058,"journal":{"name":"African Transport Studies","volume":"3 ","pages":"Article 100017"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The aftermath of Covid-19: Changes in travel mode attributes for young males and females in Cape Town","authors":"Jennifer Louisa Baufeldt,&nbsp;Marianne Vanderschuren","doi":"10.1016/j.aftran.2024.100016","DOIUrl":"10.1016/j.aftran.2024.100016","url":null,"abstract":"<div><h3>Introduction</h3><div>The effects of considering different COVID-19 pandemic scenarios on attributes of transport modes for females and males are explored in this paper.</div></div><div><h3>Background</h3><div>The COVID-19 pandemic heavily affected the transport system of Cape Town, South Africa. Young adults, in particular, experienced high uncertainty, stress, and anxiety levels, due to the COVID-19 pandemic.</div></div><div><h3>Methods</h3><div>Data was collected from University of Cape Town students in online surveys. Individuals were assigned to one of three COVID-19 scenarios: ‘before’ (n=192), ‘during’ (n=210) and ‘after COVID-19’ (<em>n</em> = 229).</div></div><div><h3>Results</h3><div>Females and males consistently differed significantly in their perceived personal security, regardless of the COVID-19 scenarios.</div></div><div><h3>Conclusion and recommendations</h3><div>This paper shows that some transport modal attributes were affected differently per gender, ‘before’, ‘during’, and ‘after COVID-19’ scenarios. This provides insights into how the COVID-19 pandemic affected the transport attributes of young adults in Cape Town in the ‘missing middle’ and higher-income groups. Personal security is a main priority, especially for females, but is also relevant for males. This should be addressed in shared transport modes if young adults are to be drawn away from car ownership.</div></div>","PeriodicalId":100058,"journal":{"name":"African Transport Studies","volume":"3 ","pages":"Article 100016"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring road users' awareness and perceptions of advanced traveler information systems (ATIS) in Kumasi, Ghana","authors":"Williams Ackaah ,&nbsp;Alexander Yao Segbefia ,&nbsp;Isaac Dela Segbefia ,&nbsp;Zakari Abdul Karim Awini","doi":"10.1016/j.aftran.2025.100027","DOIUrl":"10.1016/j.aftran.2025.100027","url":null,"abstract":"<div><div>Traffic congestion, mobility challenges, and CO₂ emissions are global issues that require innovative solutions. This study explores the potential of Advanced Traveler Information Systems (ATIS) to alleviate congestion in Kumasi, Ghana, by leveraging Information and Communication Technologies (ICT) to encourage voluntary travel behavior change. It also aims to assess road users' attitudes towards ATIS in Ghana. A cross-sectional design was used, with closed-ended questionnaires sampling 1206 respondents through a multi-stage technique. A binary logistic regression model identified significant factors influencing ATIS use, including driver type, sex, age, education, income, and length of stay in the city (<em>P</em> &lt; 0.05). Despite 98 % of road users being aware of ATIS, actual usage remains low, with only 61 % utilizing the technology for trip planning. The study recommends building a robust ATIS infrastructure while ensuring data privacy. These findings emphasize the need to explore factors beyond awareness, such as usability, perceived benefits, and trust in the system.</div></div>","PeriodicalId":100058,"journal":{"name":"African Transport Studies","volume":"3 ","pages":"Article 100027"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Data-driven culture analytics capability and road transport service quality: The differing impacts of employee cognitive and emotional empathy","authors":"Philip Siaw Kissi","doi":"10.1016/j.aftran.2025.100051","DOIUrl":"10.1016/j.aftran.2025.100051","url":null,"abstract":"<div><div>Data analytics is becoming an essential tool for improving service delivery in public transport systems. However, the role of employees' cognitive and emotional empathy in translating data insights has not been adequately examined. This study investigates the relationship between Data-Driven Culture Analytics Capability (DDCC) and road transport service quality, considering the mediating role of cognitive empathy and the moderating effect of emotional empathy. A stratified random sampling technique was used to select 523 employees working in Ghana's public road transport sector, including bus drivers, conductors, ticketing officers, and customer service representatives. Partial Least Squares Structural Equation Modeling (PLS-SEM) was employed to test the proposed relationships. The results reveal that DDCC significantly predicts both cognitive empathy and service quality. Additionally, cognitive empathy partially mediates the relationship between DDCC and service quality. Furthermore, emotional empathy moderates the relationships between (a) DDCC and service quality and (b) cognitive empathy and service quality. This study provides new insights into how human-centered capabilities, specifically cognitive and emotional empathy interact with data-driven strategies to enhance service outcomes.</div></div>","PeriodicalId":100058,"journal":{"name":"African Transport Studies","volume":"3 ","pages":"Article 100051"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144211863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Risk perception, road safety culture, and aberrant riding behavior among three-wheel motor vehicle riders in Ghana","authors":"Sisu Abubakari,&nbsp;Abdul-Raheem Mohammed,&nbsp;Mustapha Alhassan","doi":"10.1016/j.aftran.2025.100054","DOIUrl":"10.1016/j.aftran.2025.100054","url":null,"abstract":"<div><div>Road user behavior contributes to a significant proportion of road traffic accidents worldwide. These accidents often result in severe injuries and fatalities. The study explored the contribution of risk perception and road safety culture among three-wheel motor vehicle riders in Ghana. A cross-sectional survey design was employed, where data were obtained from 256 riders through a structured questionnaire. The results showed a significant positive correlation between road safety culture and risk perception (ρ = 0.319, <em>p</em> &lt; 0.01). Both risk perception (β = −0.317, <em>p</em> &lt; 0.001) and road safety culture (β = − 0.328, <em>p</em> &lt; 0.001) significantly reduced aberrant riding behavior. Mediation analysis indicated that risk perception had a direct negative effect on aberrant riding behavior (β = − 0.4222, <em>p</em> &lt; 0.001) but a positive impact on accident involvement (β = 0.5739, <em>p</em> = 0.006), with partial mediation via aberrant riding behavior (β = 0.2210, 95 % CI = 0.0416, 0.4571). Road safety culture did not directly affect accident involvement (β = 0.2727, <em>p</em> = 0.329) but exhibited full mediation via aberrant riding behavior (β = 0.3290, 95 % CI = 0.1119, 0.5985). The findings indicated that higher risk perception is associated with adherence to safety culture norms. Also, while higher risk perception and a strong road safety culture reduce aberrant riding behavior, they are paradoxically linked to higher accident involvement via aberrant riding behavior. These findings have implications for accident prevention and safer road practices among three-wheel motor riders.</div></div>","PeriodicalId":100058,"journal":{"name":"African Transport Studies","volume":"3 ","pages":"Article 100054"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prospects of Ghana's inland water transport development: An informal transport services delivery perspective","authors":"Daniel Atuah Obeng ,&nbsp;John Bernard Koranteng-Yorke ,&nbsp;Emmanuel Dzisi","doi":"10.1016/j.aftran.2025.100038","DOIUrl":"10.1016/j.aftran.2025.100038","url":null,"abstract":"<div><div>Inland Water Transport (IWT) services have been widely used in countries as alternate means of transport. However, in Ghana, this important resource is underutilized even though surface water makes 5 % of the total land area and more than 80 % of this resource is navigable. This study assesses the constraints and potential of the informal inland transport service delivery within the context of developing an efficient inland water transport system on the Volta Lake. Primary data was collected from 300 study participants through interviews and questionnaires in 26 adjoining communities and secondary data from extant literature. Study findings revealed an estimated monthly passenger of 265,550 persons and a total monthly freight tonnage of 63,856 were realized from transport services provided by 4553 boats. Only 30 % of the main access roads to communities were in good condition and about 62 % of them featured a vibrant boat building industry. In total, 2.3 million people are estimated to be socio-economically impacted, and their accessibility and mobility needs will require attention, in addition to the enormous natural resources located within the Lake's sphere of influence. The prospects are therefore good for investments in improving navigational channels, landing sites, provision of safer boats and complimentary station facilities, among others, within an overall efficient IWT services and a multi-modal transport system.</div></div>","PeriodicalId":100058,"journal":{"name":"African Transport Studies","volume":"3 ","pages":"Article 100038"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143877000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stakeholder insights on enhancing public transport services in sub-Saharan African cities – Perspectives from Accra-Ghana and Dar es Salaam-Tanzania","authors":"Gift Dumedah ,&nbsp;Hannibal Bwire ,&nbsp;Albert Mwauzi ,&nbsp;Steven Jones","doi":"10.1016/j.aftran.2025.100037","DOIUrl":"10.1016/j.aftran.2025.100037","url":null,"abstract":"<div><div>Public transport (PT) systems in sub-Saharan African (SSA) cities are critical for urban mobility and economic development, yet they face numerous challenges that hinder their efficiency, equity, and sustainability. These challenges include exorbitant operating costs, deteriorating road infrastructure, and significant gender imbalances among the stakeholders involved in planning, management, and operation. Addressing these interconnected issues is essential for developing robust, equitable, and efficient PT systems that can support the growing urban populations in SSA. Accordingly, this study examines key stakeholders' perspectives on improving PT through an in-depth analysis of PT systems in Accra-Ghana, and Dar es Salaam (DAR)-Tanzania, focusing on stakeholders, existing systems, route configurations, fares, vehicle distribution, service areas, passenger information, operations, and capacity-building needs. The study findings are based on data collected from a semi-structured interview guide administered in person to 20 agencies in Accra-Ghana, and 12 agencies in DAR-Tanzania involving local government, transport regulators, transport unions, user groups, law enforcement, and research institutions. The findings reveal significant gender imbalances among stakeholders, high operating costs, poor road conditions, and poor fare structures in both cities. Despite these challenges, there is a strong commitment to improving PT systems through better route setup, vehicle allocation, and passenger information systems. The study highlights the importance of tailored solutions to address the unique needs and challenges of PT in each city. Policy implications include addressing gender imbalances, improving road conditions, reducing operating costs, and promoting fare transparency and professional certification. By leveraging these insights, policymakers and urban planners can develop targeted interventions to create more efficient, equitable, and sustainable PT systems in Accra-Ghana and DAR-Tanzania and, by extension, in SSA cities.</div></div>","PeriodicalId":100058,"journal":{"name":"African Transport Studies","volume":"3 ","pages":"Article 100037"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143883286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}