Morning Sessions 1 & 2 -- Detector Design and Timing Peter Koonce KITTELSON & ASSOCIATES, INC. Best Practices for Signal Operations

Traditional Approach Signal design phase may not consider actual operations (or vice versa) Session 1 – Design –Consider layout and placement of detectors Session 2 – Timing –Consider operations of the signal controller Signal design phase may not consider actual operations (or vice versa) Session 1 – Design –Consider layout and placement of detectors Session 2 – Timing –Consider operations of the signal controller

Speaker’s Outline Discuss Purpose(s) for Detection –Safety and/or Efficiency (Both Session 1 & 2 Layout and Timing) 1.Detection Layout and Location (Design) 2.Detection Functions (Timing) Discuss Purpose(s) for Detection –Safety and/or Efficiency (Both Session 1 & 2 Layout and Timing) 1.Detection Layout and Location (Design) 2.Detection Functions (Timing)

Detector Purpose Design for Safety and/or Efficiency Any Consideration of Timing Functions in Design Phase or vice versa? Design for Safety and/or Efficiency Any Consideration of Timing Functions in Design Phase or vice versa? Future Topic Not going to address

Are the detection needs different at…..? Type of conditions –Urban conditions –Rural conditions – high speed, mostly uncoordinated/fully actuated Coordinated vs. Uncoordinated High-speed conditions High-speed Coordinated Type of conditions –Urban conditions –Rural conditions – high speed, mostly uncoordinated/fully actuated Coordinated vs. Uncoordinated High-speed conditions High-speed Coordinated

Detection Layout and Location (Design) Briefly explain and provide (standard drawings, graphs, or spreadsheets) your detection layout approach. Discuss methodology used to determine the number of detectors, what criteria is used? Briefly explain and provide (standard drawings, graphs, or spreadsheets) your detection layout approach. Discuss methodology used to determine the number of detectors, what criteria is used?

Detector Location and Layout (Design) Considering the following questions –What is the procedure for determining whether detection is necessary? –What technologies do you use and why? –Any special considerations for pedestrians and cyclists? –How do you wire the detectors in the field and/or cabinet? –What questions do you have of the research community? Considering the following questions –What is the procedure for determining whether detection is necessary? –What technologies do you use and why? –Any special considerations for pedestrians and cyclists? –How do you wire the detectors in the field and/or cabinet? –What questions do you have of the research community?

Detection Timing (Operations) Briefly explain your approach to detector timing Discuss the timing functions used –What are the basic parameters that are used for detection timing and what is their purpose? Volume density functions, Min Green, etc. Briefly explain your approach to detector timing Discuss the timing functions used –What are the basic parameters that are used for detection timing and what is their purpose? Volume density functions, Min Green, etc.

Detector Functions and Timing (Operations) Considering the following questions –How do different technologies change what you do? –What effect does speed changes have on your approach? –Do you change parameters depending on the operation of the intersection (isolated and coordinated or by time of day)? –How do additional through lanes (2 or more) effect your approach to timing (gap settings, dilemma zone)? –How much does the public effect what you do and what effect exists? –Do you use detector timing features and contrast that with controller timing features? Considering the following questions –How do different technologies change what you do? –What effect does speed changes have on your approach? –Do you change parameters depending on the operation of the intersection (isolated and coordinated or by time of day)? –How do additional through lanes (2 or more) effect your approach to timing (gap settings, dilemma zone)? –How much does the public effect what you do and what effect exists? –Do you use detector timing features and contrast that with controller timing features?

Guidelines Presentations should be minutes Feel free to ask the audience questions Provide examples (spreadsheets, charts, or tables where possible) Presentations should be minutes Feel free to ask the audience questions Provide examples (spreadsheets, charts, or tables where possible)

Information Sharing Please the powerpoint file and any supporting documentation by July 21 st Presentations will be posted to the web by July 23 rd Please the powerpoint file and any supporting documentation by July 21 st Presentations will be posted to the web by July 23 rd