Determinants of Bus Dwell Time for Addis Ababa City Bus Transport
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Date
2018-06
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Addis Ababa University
Abstract
Bus dwell time, which is the time needed for buses to board and alight passengers at bus
stops or stations and door opening and closing time, is one of the components bus travel
time. Longer dwell times and variability of dwell times leads to an increase in total travel
time thus passenger delay and passengers’ discomfort is eminent. The variability of
dwell time makes the schedule of Addis Ababa city bus enterprise agencies
unpredictable. The emphasis of this research is so to identify and quantify the
determinant factors which play a role to the variability and increase of dwell time of
Addis Ababa City buses and to develop multiple linear regression models to predict
dwell time based on manually collected data of nine routes in Addis Ababa.
Passengers boarding and alighting, number of standing passengers, fare collection media,
time periods of the day, floor levels of buses, number of lanes of the roads the bus
travelling on, and bus types are the factors considered in the research. 868 dwell time
data are collected manually for the research and terminus stops are not considered as they
lead to wrong bus dwell time estimation.
Three types of analysis are involved: statistical and regression analysis along with model
development. The results of the analysis are presented and interpreted in tabular, chart
and in calculation forms. Dwell time takes up to 14% on average of the total travel time
of the studied routes and the minimum recorded dwell time is 5 seconds and the largest
dwell time is 175 seconds. The average dwell time is 25.64 second and the overall dwell
time model has a significant value of F less than 0.05. Finally the 12 closed type
questions were presented to 60 bus users and the response of the questionnaire are
included in the research. In addition to this the capacity of bus stops and performance of
two bus stops are done.
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Keywords
Dwell Time, Passengers boarding, Passengers alighting, Number of standees