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Traffic in 2023: Nationwide Arterial Demand and Performance Trends Through the Lens of Virtual SPMs

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The live event has ended. Recording now available to view on-demand.

This webinar is part of the Industry Council Product Showcase and is hosted by Industry Council member, INRIX.

To learn how to register and see more information about the webinar including PDH credit certificate fees, please view the webinar course page here.

Webinar Description:

The Federal Highway Administration defines automated traffic signal performance measures (ATSPM) as “a collection of data analytics tools and approaches that automatically collect and convert high-resolution traffic controller data into actionable performance measures.” While undoubtedly powerful and aid professionals by enabling a shift from reactive to proactive management, ATSPMs require significant equipment upgrades and additional detection to gain full benefits.As an extension and complement to ATSPMs, ‘virtual’ SPMs approach signal analysis by analyzing the quality of flow of vehicles through intersections, for any/all movements, without the need for ANY new infrastructure investments. In 2021, INRIX published the first comprehensive nationwide assessment of traffic signal performance via virtual SPMs, the INRIX U.S. Signals Scorecard. The Signal Scorecard has been updated twice, most recently in the spring of 2023 based upon nearly 5 billion samples across more than 240,000 intersections across different seasons of 2022.
Building upon the 2022 U.S. Signals Scorecard, this session will leverage data from the first half of 2023 to provide an updated analysis on traffic signal demand and performance for more than 260,000 US intersections. Data from 7 straight quarters and 8 quarters overall since late 2020 provide unprecedented insights and are now allowing year-over-year trending.

Learning Objectives:
  • Understand key ‘Virtual’ Signal Performance Measures (SPMs), and how they compare and contrast with infrastructure-based SPMs
  • Learn how connected vehicle data can be used to assess national and regional results and trends for traffic volume, and the key SPMs of delay/vehicle, arrival on green and split failures
  • Discuss the benefits and drawbacks of sampling approach to SPMs using connected vehicles
  • Review how traffic demand has changed post-Covid and discuss if we have reached the ‘new normal’ for traffic volume patterns
  • Explain how networkwide data can be used to screen for anomalies to aid in reducing unnecessary intersection delay

Policies: The last day to register on-demand is February 22, 2024.
Participants are able to purchase and retrieve their PDH credit certificate until their access to the content expires. After the content expires and goes into archive, the PDH credit certificate opportunity is forfeited.


  • Rick Schuman, Senior Fellow | INRIX

    Rick Schuman is a Senior Fellow at INRIX. Rick joined INRIX in 2006, as the first employee to focus on building public sector business. Rick is the main author of the INRIX Traffic Signals Scorecard and has been deeply involved in ITS and transportation operations and performance measurement for over 30 years. Rick is a member of ITE and was an original staff member of ITS America in 1991. Rick is based in Orlando, Florida.

  • Shaun Quayle, Senor Traffic Engineer | INRIX

    Shaun is a senior traffic engineer with INRIX. He acts as a bridge between customers and product development. He works closely with national public agencies to help maximize mobility and safety benefits within the Signal Performance Measurement ecosystem. Shaun has over 20 years of industry experience in the public sector and consulting.

September 20, 2023
Wed 2:00 PM EDT

Duration 1H 30M

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