Browsing by Author "Ndibatya, Innocent"

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    Characterizing the movement patterns of minibus taxis in Kampala’s paratransit system
    (Journal of Transport Geography, 2021) Ndibatya, Innocent; Booysen, M.J.
    Urban travelers in Africa depend on minibus taxis for their daily social and business commuting. This paratransit system is loosely regulated, self-organizing, and evolves organically in response to demand. Our study used floating car data to analyze and describe the movement characteristics of nine minibus taxis in Kampala, Uganda. We made three intriguing findings. Firstly, in searching for, picking up and transporting passengers, minibus taxi trajectories followed a heavy-tailed power-law distribution similar to a “Lévy walk”. Secondly, their routes' topology and shape gradually changed. Thirdly, the extraordinary winding (expressed in terms of tortuosity) of the paths suggested the extreme determination of the drivers' search for passengers. Our findings could help city planners to build on the self-organizing characteristics of the minibus taxi system, and improve the mobility of travelers, by optimizing routes and the distribution of public amenities.
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    Minibus taxis in Kampala's paratransit system: Operations, economics and efficiency
    (Journal of Transport Geography, 2020) Ndibatya, Innocent; Booysen, M.J.
    Most cities in sub-Saharan Africa rely for their public transport on paratransit in the form of fourteen- to twenty-seater privately owned and mostly old minibus taxis. The system is often seen as disorganized, unregulated and inefficient. To assess the accuracy of this picture, we analyzed the operations and economics of Kampala's minibus taxi system and its efficiency from the passengers' and the drivers' perspectives, using ‘floating car data’. We found that the picture is largely accurate. Our findings suggest the need for moderate transformation: adequate enforcement of regulations, reorganization of ownership, renewal of fleets, and integration of ICT systems to facilitate scheduling, booking and fare collection. This will help to make the system safer, cleaner and more efficient for Kampalan commuters and more stable, secure and profitable for the minibus taxi drivers and the mini industries that depend on them.