A Distributed Smart Signal Architecture for Traffic Signal Controls

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A Distributed Smart Signal Architecture for
Traffic Signal Controls

• Dustin DeVoe
• Richard Wall, PhD
• University of Idaho
• Moscow, ID USA

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Motivation for Distributed Control

• Reduce Complexity
• Enabling technologies
• Promotes open architecture
• Encourages development of new technologies and
  services
• Overcome legacy technology and practices
• Less expensive installation
• Easier to tune
• Reduce misinformation
• Improve service to all users

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Research Goals

• Identify Suitability
• New control devices
• New instrumentation
• Identify Advantages
• Access
• Safety
• Reconfigurable
• Upgrades

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Evolution of Traffic Control
Mechanical Switch Traffic Controllers of 1924
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Evolution of Traffic Control

• NEMA TS1 Standard - 1976

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US Approach - Distributed Control?
NEMA TS2 Standard - 1992
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Application of Distributed Standard

• Implementation of IEEE 1451 Plug and Play

Arbitrary Network
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Current Traffic Control Design
NEMA TS2 Controller System
NTCIP National Transportation Committee for
Intelligent Transportation Systems Protocol
Web Based Configuration Interface
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Smart Signals Traffic Control Design
NEMA TS2 Controller System
Advanced Controller System
NTCIP National Transportation Committee for
Intelligent Transportation Systems Protocol
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Communication of Information
NTCIP Traffic Communication Standard
Plug and Play Network
Traffic Controller
Encrypted Power-line Ethernet Communications
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Results

• Able to implement IEEE 1451
• Allowed dynamic signaling
• Easy implementation of innovative devices
• Enabled Plug n Play
• Resolved inaccuracy issues with distribution of
  information
• Required translation of standards
• Did not comply with accepted industry practices
• Proprietary interface

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Project Progression
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Work in Progress
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Conclusion

• Increased flow of information can improve level
  of service at the signal
• Distributed architecture increases system
  functionality
• IEEE 1451 is implementable for an traffic control
  environment
• Required translation of information between
  protocols

15
Future Work

• Network Security
• Intrusion
• Reliability
• Performance recording
• Educating the Industry
• Field Tests
• Human Factors
• Smart Vehicle Signals
• Integrate with Federal Initiatives

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Long Term Goals