AVL Systems for Bus Transit: Update (2008) / Chapter Skim
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Pages 44-54
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44 This section provides more detailed information on selected bus AVL system implementations. The following profiled implementations were selected from survey respondents to provide diversity in geographic location, fleet size, system integrator, and AVL system functionality (see Table 33)
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45 Agency Reported Fleet Size Systems Integrator Year Completed AVL System Functionality Beaver County Transit Authority 11–50 Siemens VDO 2003 AVL central software MDTs with GPS APC DMS for real-time passenger information King County Metro -- Fixed Route 1,201+ Harris (current) INIT (to be implemented)
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46 The primary staffing impact has been the addition to maintenance of an ITS specialist. In addition to the operating cost impact of the additional staff support for maintenance, there is an annual cost for spares and system support services from Siemens.
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47 This case study separately discusses the fixed-route and paratransit AVL systems, because KC Metro operates independent systems for these purposes. The Dial-A-Ride Transit deviated route vehicles are not currently equipped under either of these AVL systems.
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elements to the 386 chipset. This user interface software was in time rewritten to allow a migration to PC-based computer hardware and the Windows operating system.
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49 viding the current vehicle passenger load) to the traffic signal system to assist its decisions on when to grant priority.
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of more than 6% is significant. It represents the incremental improvement in productivity with the introduction of the MDTs alone, on top of the productivity improvements associated with the earlier introduction of the paratransit scheduling and dispatch management software.
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51 ACCESS uses the system in various additional ways beyond its core function for managing daily fleet operations and automating the distribution and completion of manifests. • The data have been used to calibrate parameters in PASS that affect vehicle scheduling to best fit actual operating conditions.
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complaints and reduce voice radio traffic through MDT text messaging. An AVL system with more consistent mobile data communications capability is also expected to provide benefits from comprehensive and reliable on-time performance reporting.
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53 Building on the experience with bus AVL in AZTech, it was decided to implement a comprehensive bus AVL system as part of the regional communications project. It was considered advantageous to integrate the design of the radio mobile data communications system needed for the bus AVL system into the overall design of the voice communications system.
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There is currently a shift in emphasis to fully develop the potential for all capabilities of the system, including a current focus on monitoring on-time performance, tracking service interruptions, and monitoring pullouts (especially for the emerging BRT service)
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