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A hybrid fixed and flexible transpor...
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University of Southern California.
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A hybrid fixed and flexible transportation service: Description, viability, formulation, optimization and heuristic.
紀錄類型:
書目-語言資料,印刷品 : Monograph/item
正題名/作者:
A hybrid fixed and flexible transportation service: Description, viability, formulation, optimization and heuristic./
作者:
Quadrifoglio, Luca.
面頁冊數:
139 p.
附註:
Adviser: Maged Dessouky.
Contained By:
Dissertation Abstracts International66-11B.
標題:
Engineering, Industrial. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoeng/servlet/advanced?query=3196878
ISBN:
9780542427527
A hybrid fixed and flexible transportation service: Description, viability, formulation, optimization and heuristic.
Quadrifoglio, Luca.
A hybrid fixed and flexible transportation service: Description, viability, formulation, optimization and heuristic.
- 139 p.
Adviser: Maged Dessouky.
Thesis (Ph.D.)--University of Southern California, 2005.
Most transportation systems fall into two broad categories: fixed-route systems that are cost efficient but lack of flexibility and demand responsive transit (DRT) systems which are flexible but costly. The Mobility Allowance Shuttle Transit (MAST) service is a new concept in transportation that merges the flexibility of DRT systems with the low cost operability of fixed-route bus systems. In a MAST system vehicles follow a base fixed-route composed by a few mandatory checkpoints conveniently located at major connection points; given an appropriate slack time, vehicles are allowed to deviate from the fixed path within a proper service area to pick up and drop off passengers at their desired locations.
ISBN: 9780542427527Subjects--Topical Terms:
626639
Engineering, Industrial.
A hybrid fixed and flexible transportation service: Description, viability, formulation, optimization and heuristic.
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Most transportation systems fall into two broad categories: fixed-route systems that are cost efficient but lack of flexibility and demand responsive transit (DRT) systems which are flexible but costly. The Mobility Allowance Shuttle Transit (MAST) service is a new concept in transportation that merges the flexibility of DRT systems with the low cost operability of fixed-route bus systems. In a MAST system vehicles follow a base fixed-route composed by a few mandatory checkpoints conveniently located at major connection points; given an appropriate slack time, vehicles are allowed to deviate from the fixed path within a proper service area to pick up and drop off passengers at their desired locations.
520
$a
The purpose of this research is to address the gap in the research community by studying this hybrid fixed and flexible type of service providing insights of its challenges and foreseeing its performance for utilization in large scale as an alternative to conventional public services.
520
$a
The system is defined as viable if the longitudinal velocity along the primary direction of the service is higher than a minimum threshold value to maintain the service attractive to customers. By using continuous approximations we develop a relationship between this velocity and the demand to assess the viability and aid in the setting of the main parameters of the service.
520
$a
For the static operating scenario we provide a mathematical formulation of the MAST system as an integer linear program and we aim to find the optimal schedule. Because of the combinatorial nature of the problem we develop a set of valid inequalities to increase the lower optimality bound and efficiently speed up the search for the optimal solution.
520
$a
For the dynamic operating scenario we develop a customized insertion scheduling algorithm, which includes control parameters to prevent the "wild" consumption of the slack time and significantly improve the performance of the algorithm. A comparison vs. conventional fixed-route systems show that MAST services are competitive with conventional ones and perform better under certain demand distributions.
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