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Key Message:
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In order to
implement true real-time IDTO, the following changes must occur. Note that these changes represent those
that typically would be needed, but all of these items may not necessarily be
required in all deployment locations or scenarios.
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Establish
Information Sharing System - Independent agency systems would need to
begin freely exchanging information among one another, in real time,
following standard data exchange methodologies, e.g. following NTCIP C2C
guidelines, TMDD, etc. The information
exchange should allow for recommendation of decision support responses to
agency systems, potentially including the direct control of field traffic
management assets.
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Implementation
of a Region-wide Communications Network - To collect sufficient data and
to enable the regional transportation network, a relatively high-bandwidth
communications network is a prerequisite. The network may be provided by the
Internet, a common carrier or be agency-owned infrastructure, but is necessary
to move data and imagery between management centers. The Internet is increasingly becoming the
network of choice for many transportation applications.
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Create
Multimodal Historical Database - Containing road condition data, regional
ITS configuration data, response plan information etc. Most regions have legacy data repositories
in existing freeway, arterial and transit management systems. Integrating different data sets and formats
is a technical challenge that must be overcome to effectively implement a
multi-modal DSS.
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Enable/Create
Common Operating Picture (COP) - To effectively implement IDTO, the
ability of multiple agencies to see data from individual modal management
systems on a common geo-referenced visual display (large screen wall, desktop
workstation, mobile device) is desired.
The COP can be tailored to the needs of the transportation system
manager to only show data layers needed for effective decision support.
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Visualization
Platform - In order to effectively evaluate IDTO recommendations, a
method of visualizing transportation network conditions, response plans and
generated actions is preferred.
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True System
Interoperability - Interoperability will be a key element in the regional
integration of Decision Support Systems.
Two key standards for both collecting data and sending control
commands are the Transportation Management Data Dictionary, Version 3.0 and
J2735. These standards will be
implemented in the Dallas and San Diego Integrated Corridor Management
Systems, which are expected to be leaders in the development of newer
generation DSS systems. Also to be
taken into account for interoperability will be the NTCIP device
communications standards.
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Improved
Logistical Support - As with any other ITS technology, DSS implementation
must be carried out using solid system engineering principles with due
attention paid to logistical support requirements. These include proper
documentation, operator selection and training, an Operations and Maintenance
Plan and ongoing configuration management, both at the system and operational
levels.
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On-line
Modeling Capabilities - To enhance the capability to analyze strategies,
perform complex data calculation in real-time and in certain cases enable
predictive capabilities. On-line
modeling tools can be an effective way to perform such functions and in turn
are desired for IDTO deployments, although not necessary strictly required.
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Predictive
Tools - The new genre of intelligent transportation management looks
toward managing by anticipation rather than reaction, i.e., attempting to
predict adverse or negative conditions and then preventing them from
occurring or at least lessening their effects. For these reasons, implementation of
real-time or faster than real-time predictive tools are desired for IDTO to
continuously provide anticipated network conditions up to 60 minutes in
advance.
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Develop a
Workflow Engine - The IDTO requires a workflow engine that replicates
modal management workflows. The
workflow engine is envisaged as the tracking and sequencing mechanism for
what happens when recommended actions are issued. It will track recommendations and feedback
into the recommendation process, e.g. freeway ramp signal timings may have
been changed but a city has not responded by making requested arterial timing
changes leading to serious queues. The
engine will be designed to follow the sequence of events and present
modifications.
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Create
Centralized Rules-Based DSS Engine - At the nucleus of the IDTO is a
rules-based IDTO engine that links or uses many of the components outlined
above. This engine is envisioned to be
an interactive, software-based system that extracts useful information from a
combination of modal data sources and knowledge bases (operational rules) and
converts these into actions and/or recommendations that influence performance
of the transportation network, based on specific rules entered into the
engine database.
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Create/Train
Multimodal Operators – A training program is needed for existing system
operators or new “Multimodal Operators” on how to manage systems across
systems and jurisdictions taking all modes into account
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