planning for success: applying systems engineering to asct implementation
DESCRIPTION
Planning for Success: Applying Systems Engineering to ASCT Implementation. TRANSPO 2012 October 29, 2012. Eddie Curtis, PE FHWA Office of Operations / Resource Center. Trigger Event. 1 Monitor Traffic. A daptive S ignal C ontrol T echnology. Data Collection. Modeling / Optimization. - PowerPoint PPT PresentationTRANSCRIPT
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Planning for Success: Applying Systems Engineering to
ASCT Implementation
TRANSPO 2012October 29, 2012
Eddie Curtis, PEFHWA
Office of Operations / Resource Center
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2
Adaptive Signal Control Technology
1Monitor Traffic
2Evaluate Performance
3Update Timing
Trigger Event
Data Collection
Modeling / Optimization
Implement & Fine Tune
Reporting
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US Implementation 1992-2009
Source: NCHRP 403 2010 & FHWA Arterial Management Program
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ASCT Systems Deactivated 1992 - 2009
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Knowledge gained from demonstrations
• Substantial benefits over coordinated TOD operation– Travel time, Delay, Emissions, – Congestion, Safety
• Most effective where demand conditions are Variable and unpredictable
• Linear Arterials, limited success within tight grids
• Under Saturated
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What we know about Traffic Signal Management & Operations Practices
2005 2007 2012
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Technology Innovation
• Warm Mix Asphalt
• Precast Bridge Elements
• Geosynthetic Reinforced Soil
• Safety Edge
• Adaptive Signal Control Technology
Better, Faster, Smarter
Shortening Project Deliveryo Planning & Environmental Linkages
o Legal Sufficiency Enhancements
o Expanding Use of Programmatic Agreements
o Use of In–Lieu Fee and Mitigation Banking
o Clarifying the Scope of Preliminary Design
o Flexibilities in ROW
o Flexibilities in Utility Accommodation and Relocation
o Enhanced Technical Assistance on Ongoing EISs
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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
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Barriers to Adoption
– Complexity
– Cost
– Uncertainty about Benefits
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Possible Approaches
• Consumer Reports – Evaluate Available
Technology– Consult with vendors /
Distributors– Deploy small scale
system (DEMONSTRATION)
– Evaluate– Abandon or Expand
• Systems Engineering– Objectives– Needs / Constraints– Requirements– Design– Implement– Verification– Validation– (Operate & Maintain)– Abandon or Expand
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Successful Deployment
• Goals well understood• Agency describes its needs• Positive response to requirements in RFP• Requirements are verified • Performance objectives are validated • System is effective over entire life cycle
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What are the Risks - ASCT?
• Problem could be solved with other strategies• Functional Objectives of the system do not
align with agency objectives• Loss of other critical functions / features• Constraints not properly addressed• Cost• Maintenance
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Other Risk Issues• Technology NEW to most• Technology still evolving• Most systems have very limited track record• Documented history of failed ASCT projects (40%+)• Significantly increased complexity• Extremely dependant upon infrastructure
– Communications systems– Detection– Staff
• Not “one size fits all”• Marketing often exceeds performance
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The Role of Systems Engineering
Understanding the problem
•Projects getting bogged down with shifting requirements
•Acquisitions being challenged by unsuccessful bidders/proposers/vendors
•Projects not meeting agency needs
Managing risk
+ it is mandatory for federal-aid projects
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Purpose of SE Model Documents• Evaluate need for Adaptive Control• Help agencies identify verifiable,
needs-driven requirements for evaluating design and implementation choices
• Model documents greatly reduce systems engineering effort by providing wording and documentation…
• …but agencies still must identify their needs
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Model Document Process
Build Requirements• Answer questions• About the situation• About you
• Select and tailor ConOps statements
• Select and tailor requirements
Evaluate Alternatives• Evaluate proposed
approaches/products against requirements
• Solution feasible given constraints?
Continue Tailoring Until Solutions… • Fulfill requirements• Are feasible
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FHWA Every Day Counts Outreach/Support/Technical Assistance
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US Implementation 2010 - 2012
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FHWA EDC/ASCT Influence 2010-2012
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Rate of Implementation
Deployment 1
992 - 2009
Deployment 2
010 - 2012
Planned Deploym
ent
Deactiva
tions 1992 -2
0090
10203040506070
38
63
42
20
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Application of Systems Engineering
Completed Deployments applying SE (1992 - 2012)
Planned Deployments using SE
0%
10%
20%
30%
40%
50%
60%
70%
8%
62%
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Influencing Change
“Innovation is not what the customers does it is what the customer adopts”
~ Jesse Glazer CAL-SOUTH Change Agent
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Questions?
Eddie Curtis, P.E.Traffic Management Specialist
(404) 562-3920
http://www.fhwa.dot.gov/everydaycounts