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    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
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      <title>Scheduling multiple vehicle mobility allowance shuttle transit (m-MAST) services</title>
      <link>https://trid.trb.org/View/1354760</link>
      <description><![CDATA[The mobility allowance shuttle transit (MAST) system is an innovative hybrid transit system in which vehicles are allowed to deviate from a fixed route to serve flexible demand. In this paper, the authors develop an insertion heuristic that economically inserts the deviation requests into the schedule for multiple-vehicle MAST system, which has never been addressed in the literature. The proposed heuristic is validated and evaluated by a set of simulations performed at different demand levels and with different control parameters. By comparing its performance versus the optimal solutions, the effectiveness and quality of the heuristic is confirmed. Compared to its single-vehicle counterpart, the multiple-vehicle MAST prevails in terms of rejection rate, passenger waiting time and overall objective function, among other performance indices.]]></description>
      <pubDate>Fri, 26 Jun 2015 13:43:27 GMT</pubDate>
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      <title>Service capacity design problems for mobility allowance shuttle transit systems</title>
      <link>https://trid.trb.org/View/849274</link>
      <description><![CDATA[Transit agencies are currently seeking ways to improve service flexibility in a cost efficient manner. Mobility Allowance Shuttle Transit is a transportation concept that merges the flexibility of Demand Responsive Transit systems with the low cost operability of fixed-route bus systems. In this paper, the authors study the service capacity design problem for such a system. The authors analyze the relationship between service cycle time, and the length and width of the service area under a desired service level constraint. The analysis can be used as a guide for designing service area parameters. Given that a shuttle travels in a rectilinear pattern and utilizes a non-backtracking nearest-insertion algorithm, the authors derive closed-form approximate solutions for the service capacity design problem. The authors show that setting the length of the service area to half the travel speed of the shuttle multiplied by the cycle time is an effective approximation.]]></description>
      <pubDate>Tue, 26 Feb 2008 12:52:21 GMT</pubDate>
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      <title>Performance and Design of Mobility Allowance Shuttle Transit Services: Bounds on the Maximum Longitudinal Velocity</title>
      <link>https://trid.trb.org/View/793392</link>
      <description><![CDATA[There is a need for a transit system that provides flexible service at a cost-efficient price.  This article describe the mobility allowance shuttle transit (MAST) system, a concept the merges the flexibility of demand responsive transit (DRT) with the low-cost operability of fixed-route bus systems.  The authors develop bounds on the maximum longitudinal velocity to evaluate the performance and help the design of MAST services.  A MAST system allows buses to deviate from the fixed path so that customers within the service area may be picked up or dropped off at their desired locations.  However, the main purpose of these services is still to transport customers along a primary direction. The velocity along this direction should remain above a minimum threshold value to maintain the service attractive to customers.  The authors use continuous approximations to compute lower and upper bounds for realistic operating conditions.  Their analysis shows that a two-vehicle system, with selected widths of the service area of 0.5 miles and 1 mile, is able to serve, respectively, a demand of at least 10 and 7 customers per longitudinal mile of the service area while maintaining a reasonable forward progression velocity of about 10 miles/hour.  The relationships obtained by these calculations can be helpful in the design of MAST systems to set the main parameters of the service, such as slack time and headway.]]></description>
      <pubDate>Tue, 28 Nov 2006 11:31:18 GMT</pubDate>
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