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Bridging transportation researchers (BTR) conference*Enoch F Sam*Senior Lecturer*Transportation Research Board (TRB)*Virtual*11 August 2020*12 August 2020
Making transport resilient to pandemics*Enoch F Sam*Senior Lecturer*International Road Federation (IRF)*Webinar*25 March 2021*25 March 2021
Women and Transport Africa*Enoch F Sam*Senior Lecturer*Flone Initiative*Virtual*25 November 2020*27 November 2020
Africa’s response to COVID-19 impacts on transport and mobility*Enoch F Sam*Senior Lecturer*International Road Federation and High-Volume Transport*Webinar*29 Mach 2021*29 March 2021
Excellence in Peer Review: How to be an effective peer reviewer (*Enoch F Sam*Senior Lecturer*Taylor and Francis Reviewer Training Network*Webinar*16 July 2021*16 July 2021
Reuben Tamakloe a, Sungho Lim, Enoch F. Sam, Shin Hyoung Park, Dongjoo Park (2021). Investigating factors affecting bus/minibus accident severity in a developing country for different subgroup datasets characterised by time, pavement, and light conditions. Accident Analysis and Prevention, 159,
Abstract
Developing countries are primarily associated with poor roadway and lighting infrastructure challenges, which has a considerable effect on their traffic accident fatality rates. These rates are further increased as bus/minibus drivers indulge in risky driving, mainly during weekends when traffic and police surveillance is low to maximise profits. Although these factors have been mentioned in the literature as key indicators influencing accident severity of buses/minibuses, there is currently no study that explored the complex mechanisms underpinning the simultaneous effect of pavement and light conditions on the generation of accident severity outcomes while considering weekly temporal stability of the accident-risk factors. This study seeks to investigate the variations in the effect of contributing factors on the severity of bus/minibus accidents in Ghana across various combinations of pavement and light conditions and to identify the exact effects of weekdays and weekends on severity outcomes using a random parameter ordered logit model with heterogeneity in the means to account for unobserved heterogeneity in the police-reported data. Preliminary analysis demonstrated that accident-risk factors used in the models were temporally unstable, warranting the division of the data into both weekend and weekday time periods. A wide variety of factors such as sideswipes, median presence, merging, and overtaking had significantly varying effects on bus/minibus accident severities under different combinations of pavement and light conditions for both weekdays and weekends. Insights drawn from this study, together with the policy recommendations provided, can be employed by engineers and policymakers to improve traffic safety in developing nations.
Developing countries are primarily associated with poor roadway and lighting infrastructure challenges, which has a considerable effect on their traffic accident fatality rates. These rates are further increased as bus/minibus drivers indulge in risky driving, mainly during weekends when traffic and police surveillance is low to maximise profits. Although these factors have been mentioned in the literature as key indicators influencing accident severity of buses/minibuses, there is currently no study that explored the complex mechanisms underpinning the simultaneous effect of pavement and light conditions on the generation of accident severity outcomes while considering weekly temporal stability of the accident-risk factors. This study seeks to investigate the variations in the effect of contributing factors on the severity of bus/minibus accidents in Ghana across various combinations of pavement and light conditions and to identify the exact effects of weekdays and weekends on severity outcomes using a random parameter ordered logit model with heterogeneity in the means to account for unobserved heterogeneity in the police-reported data. Preliminary analysis demonstrated that accident-risk factors used in the models were temporally unstable, warranting the division of the data into both weekend and weekday time periods. A wide variety of factors such as sideswipes, median presence, merging, and overtaking had significantly varying effects on bus/minibus accident severities under different combinations of pavement and light conditions for both weekdays and weekends. Insights drawn from this study, together with the policy recommendations provided, can be employed by engineers and policymakers to improve traffic safety in developing nations.
Sam, E. F.
VREF Mobility in African Cities (MAC) Research Forum 2021. Virtual 19 May 2021
Paper presented:
Towards a disability-inclusive urban transport system in Accra and Nairobi: a policy-practice agenda
Abstract
The proposed project aims at a comparative analysis of the daily mobility patterns, needs, experiences and challenges of Persons with Disabilities (PWDs) in accessing urban transport systems in Accra, Ghana and Nairobi, Kenya. Premised on urban mobility concepts, disability theories and social inclusion of PWDs, the project also intends to explore the implications of these mobility challenges for their social inclusion and ability to function independently in society. There is a lack of proper guidelines to ensure the design and provision of inclusive infrastructure and services that meet the requirements of PWDs. There are also capacity gaps for key institutions dealing with issues of PWDs in creating awareness and implementing structures for their rights and under the international obligations such as the United Nations Convention on the Rights of Persons with Disabilities of 2006, Article 29 of the Constitution of Ghana (1992), and Article 54 of the Constitution of Kenya (2010) which advocate for inclusivity. These factors among others have been ascertained to negatively affect the travel patterns and general livelihood of PWDs.
The proposed project aims at a comparative analysis of the daily mobility patterns, needs, experiences and challenges of Persons with Disabilities (PWDs) in accessing urban transport systems in Accra, Ghana and Nairobi, Kenya. Premised on urban mobility concepts, disability theories and social inclusion of PWDs, the project also intends to explore the implications of these mobility challenges for their social inclusion and ability to function independently in society. There is a lack of proper guidelines to ensure the design and provision of inclusive infrastructure and services that meet the requirements of PWDs. There are also capacity gaps for key institutions dealing with issues of PWDs in creating awareness and implementing structures for their rights and under the international obligations such as the United Nations Convention on the Rights of Persons with Disabilities of 2006, Article 29 of the Constitution of Ghana (1992), and Article 54 of the Constitution of Kenya (2010) which advocate for inclusivity. These factors among others have been ascertained to negatively affect the travel patterns and general livelihood of PWDs.
Brako, I. & Asah-Asante, K., (2019). Black Mask History for Primary Schools, Learner's Book 6. Accra: Black Mask Ltd.. . ISBN: 978-9988-8932-5-5
Brako, I. & Asah-Asante, K., (2019). Black Mask History for Primary Schools, Learner's Book 5. Accra: Black Mask Ltd.. . ISBN: 978-9988-8932-4-8
Abstract
Brako, I. & Asah-Asante, K., (2019). Black Mask History for Primary Schools, Learner's Book 4. Accra: Black Mask Ltd.. . ISBN: 978-9988-8932-3-4
Abstract
