Evaluating the use of transfers for improving demand responsive systems adopting zoning strategies.
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2011-08-01
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Abstract:Due to widely dispersed population density over large and sparsely suburban/rural areas,
conventional fixed route transit services hardly satisfy the travel needs of their residents. As an
alternative, demand responsive transit (DRT) systems have flexible routes and schedules that can
provide curb-to-curb/door-to-door services to better meet the needs of rural areas. However, rural
DRT services are still extremely costly to operate. In this project researchers consider a variation
of the regular demand responsive transit system that adopts the transfer practice to reduce
operating costs. This practice has been adopted by some agencies with zoning rules for the whole
service area or trips that need to cross jurisdictional districts; however, the pros and cons need to
be carefully assessed. Researchers evaluated the effect of different transfer operating policies by
developing a simulation model of several plausible scenarios. Available data from Houston
METRO were used for testing and modeling purpose. The results indicate that zoning with
transfer can provide significant benefits to paratransit operations that are managing zoning
structure. However, no-zoning strategies, such as the one currently used by Houston METRO
performs better overall on average in terms of efficiency. This study provides decision makers
and DRT agencies with information for innovative operating practices to improve the
performance and cost efficiency of public transportation systems.
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