Traffic signal analysis and optimization workflows

  • Have you experienced PTV Vistro’s efficient traffic signal analysis workflows and optimization?  Take our modern interface for a test drive! PTV Vistro specifically solves the daily tasks of traffic operation engineers.  Powerful features like our signal groups editor, built-in leading pedestrian intervals, flashing don’t-walk estimation, and automatic local optimization toggle provides an unparalleled workflow. 

    Next, our versatile tool kit allows for the fast construction of default NEMA or custom controller sequences for both simple and complex intersections. Colorful phase diagrams display both your vehicle and pedestrian split times with interactive slider controls.  Also, route-based time-space diagrams display the efficiency of network optimization.  Furthermore, built-in Vissim export and animation preview tools confirm setup details and operations.

Multiple intersections connected on one traffic signal controller

  • Remarkably, sharing a signal controller at multiple intersections is easy– and is not a cluttered cluster.  PTV Vistro shows the entire sequence, phase diagram, and indicates locally used phases at each intersection. Notably, this makes for an intuitive setup of tight-diamond interchange terminals or signalized offset intersections.

Scenario an mitigation managers for time-of-day analysis

  • PTV Vistro’s integrated scenario manager effortlessly examines modifications to traffic signal timings and creates your peak-period timing plans. Moreover, one-click duplication of scenarios enables on-the-fly experimentation of traffic signal timing and coordination. This keeps your current timings untouched and combines all of your tests in one managed file (as shown in the first image).

    Also, the mitigation manager is your sandbox to test local intersection configurations and traffic signal timing alternatives.  These tests are also keep in the managed file to document your project decisions. Each iteration is compared to the results of the unmitigated conditions.

Traffic Signal Analysis Methods

  • Importantly, PTV Vistro implements the Highway Capacity Manual (HCM) 6th Edition, 2010 and 2000 methods. Detailed calculation parameters are customizable to analyze site-specific impacts to LOS and MOEs. Also, PTV Vistro integrates the Canadian Capacity Guide method.  This provides a practical experience-based evaluation of traffic signal operations in Canada. For planning-level calculations, PTV Vistro includes the Intersection Capacity Utilization method.

    For more information on traffic signal analysis tool and workflows, read more of our Feature Articles under the Traffic Signals section. 

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About the Author
  • Adam Lynch

    Adam is Senior Product Manager for PTV Vistro and a Certified Trainer at PTV Group. He has extensive industry experience as a Traffic Engineer/Planner using PTV Vistro for Traffic Impact Studies and Traffic Operations projects.  Connect with Adam on LinkedIn, or join the PTV Vistro LinkedIn Forum to learn more about PTV Vistro.