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Planning for Success: Applying Systems Engineering to ASCT Implementation

This presentation by Eddie Curtis, P.E., discusses the application of systems engineering to Adaptive Signal Control Technology (ASCT) implementation, emphasizing the significant benefits for road users and agencies. Key improvements include a 13%-50% reduction in travel time and an 8%-38% decrease in fuel consumption. By leveraging ongoing performance measurement, ASCT addresses challenges that traditional methods struggle with, reducing retiming intervals from years to minutes. The insights also highlight the effectiveness of adaptive systems in variable demand scenarios and various available technologies for traffic management.

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Planning for Success: Applying Systems Engineering to ASCT Implementation

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  1. Planning for Success: Applying Systems Engineering to ASCT Implementation Eddie Curtis, P.E. Traffic Management & Operations Specialist FHWA Office of Operations & Resource Center

  2. Benefits • Better • Benefits to Road Users & Agencies • Travel time reduction 13% - 50% • Fuel Consumption 8% - 38% • Ongoing performance measurement • Smarter • Solves problems that are difficult to address with time-of-day and traffic responsive • Saves cost of mundane data collection and retiming • Faster • Reduces retiming intervals from years to minutes

  3. How does ASCT Work? d = d1(PF) + d2 + d3 Retiming Effort Do Nothing Delay Constant Monitoring & Fine Tuning (ASCT) Complaints Periodic Retiming Variability in Demand Source: City of Alpharetta

  4. ASCT Deployment StatusMid 1980s – Dec 2010 Source: Aleksandar Stevanovic, Florida Atlantic University

  5. What have we learned • Adaptive systems produce substantial benefits over coordinated TOD signal timing • Travel time, Delay, Emissions, • Congestion, Safety • Most effective where demand conditions are Variable and unpredictable • Linear Arterials, limited success within tight grids • Under Saturated

  6. What we know about us 2005 2007 2012

  7. Available Systems • QuicTrac • NWS Voyage • Multi-criteria Adaptive Control • ACDSS • Synchro Green • ACSLite • BALANCE • InSync • LA ATCS • MOTION • OPAC • RHODES • SCATS • SCOOT • UTOPIA

  8. The Role of Systems Engineering

  9. FHWA Model Document Process

  10. States Engaging the Process • South Dakota • Massachusetts • Illinois • Idaho • Washington • Washington, DC • Arizona • Florida • Georgia • Meadowlands, NJ • Tennessee • Puerto Rico • Indiana • New Mexico • Pennsylvania • Alaska

  11. Eddie Curtis, P.E. Traffic Management Specialist (404) 562-3920 eddie.curtis@dot.gov Support • http://ops.fhwa.dot.gov/arterial_mgmt/index.htm • FHWA Division Office

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