COMPARING FIXED STOP AND HAIL STOP MODE OF SERVICE OF FIXED ROUTE INTRA URBAN BUS OPERATIONS
COMPARING FIXED STOP AND HAIL STOP MODE OF SERVICE OF FIXED ROUTE INTRA URBAN BUS OPERATIONS
No Thumbnail Available
Date
1996-08
Authors
OLOWOSULU, ADEKUNLE T.
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Fixed stops and Hail stops are among the possible mode
of service used in intra-urban transit. Under the fixed stop
service, vehicles stop to load or unload passengers at
designated points only. For the hail stop service vehicles
stop to load and/or unload at any point along the route on
demand by patrons.
The relative performance of fixed stop and hail stop
services have been evaluated and compared. The objective that
guided the comparison is that of minimisation of the total
system cost. Models for total system costs per passenger are
set up and the optimum headways that best satisfy the chosen
objectives are determined for each service.
Numerical values are specified for models' variables.
Sensitivity analyses have been used to isolate the parameters
affecting the total system costs and optimum headways. The
most significant elements affecting both functions are demand
on the route, length of the route, value of out-of-vehicle
time and the normal operating cost. Results from the
sensitivity analyses were then used to generate guidelines
for comparing the two modes of service under consideration
and isolate the conditions under which one service is more
appropriate for adoption than the other. On the latter, two
hypotheses were advanced, which are then used to derive a
general methodology for comparing the modes of service.
Highlight from the proposed methodology is that the demand,
value of time, the route length and the operating cost are
needed to be compared for both services. In the situations
where demand is low, value of time high, the route short and
operating cost low the hail stop may well be better. It was
found out that for a 24 seater vehicle capacity that hail
stop was better at nearly all demands considered.
The effect of vehicle size on the modes of service were
examined; larger vehicles are more appropriate to be used for
the fixed stop service and smaller capacity vehicles for the
hail stops service. Also examined is the effect of changing
0-D pattern on the services. Hail stop was found to be more
sensitive to changes in the 0-D pattern. On this basis it is
recommended that where demand is low enough, hail stop
operation should provide collective and distributive service
i.e moving patron to high activity areas(e.g CBD) and from
CBD to residential locations. While the fixed stop is more
suitable to serve as line haul service between important
major activity centres in urban areas.
Description
A THESIS PRESENTED TO THE POSTGRADUATE SCHOOL AHMADU
BELLO UNIVERSITY ZARIA, IN PARTIAL FULFILLMENT OF THE
REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE (HIGHWAY
AND TRANSPORTATION ENGINEERING)
DEPARTMENT OF CIVIL ENGINEERING
AHMADU BELLO UNIVERSITY
ZARIA
AUGUST, 1996
Keywords
COMPARING,, FIXED STOP,, HAIL STOP MODE,, FIXED ROUTE INTRA,, URBAN BUS OPERATIONS