Post on 07-Jan-2016
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A Distributed Smart Signal Architecture for Traffic Signal Controls
Dustin DeVoeRichard Wall, PhD
University of IdahoMoscow, ID USA
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 19244Univerity of Idaho Engineering
NEMA TS1 Standard - 1976
Evolution of Traffic Control
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US Approach - Distributed Control?
NEMA TS2 Standard - 1992NEMA TS2 Standard - 1992 6
Application of Distributed Standard• Implementation of IEEE 1451: Plug and Play
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Current Traffic Control Design
Ethernet on PowerlineCAT 5 Ethernet
Signal Maintenance
Bridge Controller
PED Signal Unit
Ped call button with wireless transreceiver
Traffic Operations
Advanced Controler System
Remote wireless Ped call button
NTCIP Network
PnP Network
Smart Signals Domain
Web Based Configuration Interface8Univerity of Idaho Engineering
NEMA TS2 Controller System
NTCIP: National Transportation Committee for Intelligent Transportation Systems Protocol
Smart Signals Traffic Control Design
Ethernet on PowerlineCAT 5 Ethernet
Signal Maintenance
Bridge Controller
PED Signal Unit
Ped call button with wireless transreceiver
Traffic Operations
Advanced Controler System
Remote wireless Ped call button
NTCIP Network
PnP Network
Smart Signals Domain
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Advanced Controller System
NEMA TS2 Controller System
NTCIP: National Transportation Committee for Intelligent Transportation Systems Protocol
Communication of Information
Pedestrian Call
Plug and Play
Network
Traffic Controller
NTCIP – Traffic Communication Standard
Encrypted Power-line Ethernet Communications10Univerity of Idaho Engineering
ResultsAble to implement IEEE 1451
Allowed dynamic signalingEasy implementation of innovative devicesEnabled Plug n’ Play
Resolved inaccuracy issues with distribution of information
Required translation of standardsDid not comply with accepted industry practicesProprietary interface
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Project Progression
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Work in Progress
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ConclusionIncreased flow of information can improve
level of service at the signalDistributed architecture increases system
functionality IEEE 1451 is implementable for an traffic
control environmentRequired translation of information between
protocols
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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
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