Integrating Business Processes to Improve Travel Time Reliability (2011) / Chapter Skim
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Pages 35-44
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From page 35... ...
In Michigan, MDOT transportation planners have used microsimulation modeling to evaluate traffic control plans and select the plans based in part on their impact on the overall transportation network. North Carolina: NCDOT Safety and Traffic Operations Committee NCDOT has implemented an interagency coordination process for the planning and monitoring of major construction work zones.
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The resulting information is available to guide decisions aimed at revising and improving the existing traffic management plan. The Safety and Traffic Operations Committee also considers the impacts of the project work zone on the surrounding network and seeks to efficiently plan for and minimize those impacts where possible.
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An example of the process used by the Safety and Traffic Operations Committee is shown in Figure 4.1.Figure 4.1. Detailed business process diagram of NCDOT Safety and Traffic Operations Committee.Several key integration points were identified in the NCDOT Safety and Traffic Operations Committee process, including the following: • Integration between the NCDOT Division Office, the NCDOT Work Zone Traffic Control Section, and the contractor to review work zone traffic control plans; • Integration between NCDOT, the contractor, and the NCSHP to review final plans before implementation; • Integration between NCDOT and the contractor for revised work zone plans before implementation; • Integration across all players to monitor performance of the work zone once implemented; • Integration between agencies to review potential solutions when issues are identified and implemented; and • Coordination with North Carolina's Information Management Public Affairs, Construction and Traffic Control
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The NCDOT WZTC Section is responsible for the design and management of work zones for all roadway projects across North Carolina. The NCDOT Division is responsible for the construction of the roadway projects and works closely with the WZTC Section on issues or questions regarding the work zone traffic control plans.
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From page 39... ...
The specific focus of meetings also establishes trust with the stakeholders that meetings will be successful and results will be produced. Michigan: MDOT Work Zone Traffic Control Modeling The Michigan DOT I-75 Ambassador Bridge Gateway Project includes the reconstruction of the I-75 and I-96 freeways, a new interchange for the Ambassador Bridge, a redesign of the Ambassador Bridge Plaza, and a pedestrian bridge across I-75 and I-96 to connect east and west Mexicantown in southwest Detroit.
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SEMSIM was originally developed as a tool for helping facilitate MDOT project funding decisions for Southeast Michigan. MDOT Metro Region Planning repurposed the SEMSIM model and applied it to work zone modeling of the I-75 Ambassador Bridge Gateway Project.
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Detailed Process and Integration Points Figure 4.2 presents an overview of the process that was used to develop the work zone traffic control model for the I-75 Ambassador Bridge Gateway Project. MDOT Metro Region Planning, Construction, and Traffic and Safety reviewed the models that were developed of the alternatives for construction closures for each phase of construction and selected the closure plans based in part on the impact of the closures on motorist delay and mobility.
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From page 42... ...
Some of these were included in the simulation for the Gateway. All required coordination of traffic plans; • Continual integration during construction between MDOT engineers responsible for construction and MDOT planners responsible for modeling to incorporate construction changes into the model and develop new work zone traffic control strategies; and • Use of existing SEMSIM Paramics network model of southeastern Michigan to repurpose it for microsimulation of freeway closures.Types of Agencies Involved In addition to MDOT Metro Region Planning, Traffic and Safety, Construction, Detroit TSC, and the MITS Center, the process also relied on the work completed by the consulting team selected to do the modeling and the contractor doing the construction.
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By associating cost with delay, MDOT was able to measure the monetary impact of different scenarios. The process also allowed the MITS Center to coordinate incident and real-time management along the detour routes, giving them advance notice of closures and projected traffic volumes so that they could develop operational strategies.Lessons Learned The existence of the SEMSIM microsimulation model was critical in allowing MDOT to perform a detailed microsimulation of the entire network around the I-75 Ambassador Bridge Gateway Project.
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From page 44... ...
Wunderlich. Traffic Analysis Toolbox Volume IX: Work Zone Modeling and Simulation -- A Guide for Analysts.
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