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Traffic Signal Timing Webinar Series: Context Sensitive Signal Timing

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This webinar was sponsored by the ITE Traffic Engineering Council.

Webinar Description:
This webinar will examine situations where traditional signal design and timing techniques may not adequately address the unique and/or uncommon traffic conditions present at a location. The webinar will identify these situations and seek to understand the system context and what can be done to match it. This might include such techniques as adjusting signal cycle lengths, data-driven decisions, left-turn phasing, night (off peak) operations, and coordination vs. free flow. The webinar will then describe how the District Department of Transportation manages the complex balancing act of many stakeholders while conducting the Citywide Traffic Signal Optimization Program to prioritize the mobility and safety of pedestrians and cyclists throughout this network, and develop an integrated, multimodal traffic signal system to meet its Vision Zero goals.

Learning Objectives:

  • Recognize uncommon traffic signal locations and determine design and timing criteria for them
  • Learn different types of signal timing techniques based on their system characteristics as well as how to improve their systems
  • Describe what types of signal timing treatments can be implemented to advance ped/bike mobility and safety
  • Learn how ongoing signal retiming and optimization projects can help facilitate ped/bike improvements


  • Joshua Wolfgram, P.E., Project Engineer | Mead & Hunt | Washington, DC, USA

    Joshua Wolfgram is a traffic engineer with Mead & Hunt with four years of signal timing and multimodal design experience. Some of his significant projects include crafting DDOT’s LPI Implementation policy, developing and implementing optimized signal timings at over 1100 locations in the District, and preparing engineering designs for DDOT’s Vision Zero engineering initiatives. Joshua is passionate about incorporating multimodal safety and mobility enhancements into traffic signal projects and developing transportation solutions that promote safer and better living.

  • Rahul Jain, P.E., Senior Transportation Engineer | District Department of Transportation | Washington, DC, USA

    Rahul Jain is a Senior Transportation Engineer with the District Department of Transportation. His main tasks include overseeing major transportation projects and engineering contracts to ensure engineering standards and contractual requirements are met at all levels of planning and design, and performing detailed review of traffic operations, engineering design plans PS&E packages and MOT plans. Rahul serves as a technical liaison with internal staff and external stakeholders on planning, analysis and design aspects of various operational and safety improvement projects.

  • James (Jim) Harris, Owner | JTHarris and Associates | Alta Loma, CA, USA

    Long-time traffic signal and lighting designer Jim Harris has been a City Traffic Advisor/Traffic Signal Operations Specialist and for several public agencies and consulting firms providing city traffic engineering and staff augmentation services. He was responsible for the management and acquisition of various types of projects and specializes in traffic signal operations and design. While working for one agency for almost 20 years, he was responsible for the timing, operation, design, plans and specifications for traffic signals, systems and street lighting for the City. He also served three years in the Marine Corps, most of which was in Southeast Asia with engineering units. Since 1999, he has made five trips to Kenya in East Africa and, with the help of the local people and teams from his church, built an eighty-foot bridge, a mile long waterline, two reservoirs, greenhouses, a dormitory, culverts, roadways and two orphanages. He provided survey controls for most of the construction. His publications include three ITE Informational Reports, “The Benefits of Retiming Traffic Signals”, “Using Existing Loops at Signalized Intersections for Traffic Counts” and “Sustainable Traffic Signal Development” which included presentations on such and other related topics at ITE chapter, district and international meetings.

  • Tyler Krage, P.E., PTOE, Traffic Engineer V | Chicago DOT | Chicago, IL, USA

    Tyler is traffic engineer with the City of Chicago, and helps manage their signal system. He is interested in making signal systems work for all users, and the impacts and benefits they can have on our daily lives. He spent his past eight years as a consultant in Minneapolis MN, working on signal timing projects across MN, ND, WI, and CA, and is excited in his new role on the public side in Chicago. When he isn’t thinking about signals systems, he enjoys biking, live music, and exploring both cities and the great outdoors.

October 28, 2021
Thu 3:00 PM EDT

Duration 1H 30M

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