City of Surrey Adaptive Signal Control Pilot Project 1 ITS Canada ITS Canada ITS Canada ITS Canada ITS Canada ITS Canada ITS Canada ITS Canada Annual Annual Annual Annual Annual Annual Annual Annual Conference and General Conference and General Conference and General Conference and General Conference and General Conference and General Conference and General Conference and General Meeting Meeting Meeting Meeting Meeting Meeting Meeting Meeting May May 29 29 th th , 2013 , 2013
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Adaptive Signal Control Pilot Project - ITS) Canada
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City of Surrey
Adaptive Signal Control Pilot Project
1
ITS CanadaITS CanadaITS CanadaITS CanadaITS CanadaITS CanadaITS CanadaITS CanadaAnnual Annual Annual Annual Annual Annual Annual Annual Conference and General Conference and General Conference and General Conference and General Conference and General Conference and General Conference and General Conference and General MeetingMeetingMeetingMeetingMeetingMeetingMeetingMeetingMay May 2929thth, 2013, 2013
ASCT Pilot Project Background
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� 25 Major Traffic Corridors across City
� Program to Update 4 - 8 Corridors each Year
– Timing Plans therefore Typically Updated only Once
every Five Years
� With the Continued Rapid Growth of City,
ASCT Pilot Project Background
� With the Continued Rapid Growth of City,
Pre-determined Timing Plans expected to Age
Very Quickly
– Looking for new Safe and Cost-effective Approaches
that will enable Staff to keep up with Rapid Traffic
Growth in City and more Efficiently Manage Traffic
Demand
3
� Transport Canada Supports ITS Deployment
– Strategic Highway Infrastructure Program (SHIP)
– Projects comply with ITS Plan for Canada: En Route
to Intelligent Mobility
� City of Surrey applied for, and successfully
ASCT Pilot Project Background
� City of Surrey applied for, and successfully
secured, funding for ASCT Pilot Project
� Surrey and Delcan agreed to Implement and
Evaluate ASCT Pilot Project
– Delcan’s “Multi-criteria Adaptive Control” System
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� 72nd Avenue
– 7 Intersections
– Between 120th St and King George Highway
ASCT Pilot Project Network
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ASCT Pilot Project Partners
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� McCain’s “QuicNet” Traffic Signal Management
System
� Type 170 Traffic Signal Controllers
– With “BiTrans” 233 Firmware
Current Traffic Signal Infrastructure
� Tree Topology Communications Network
– Leased Line from Control Centre to “Master”
Intersection in Field
– Both Point-to-point and Multi-point Spread Spectrum
Radio Links from “Master” to Local Controllers
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� Integrate with City’s Existing Traffic Signal
Management Infrastructure including:
– “QuicNet” Traffic Signal Management System;
– Type 170 Traffic Signal Controllers
– Wireless Communications Network
ASCT Pilot Project Objectives
– Wireless Communications Network
� ASCT to Appropriately Respond SAFELY to
Random Fluctuations in Traffic Patterns as well
as to Unplanned Incidents and Events
� ASCT to Perform as well as Best Optimized
Pre-determined Timing Plans
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Delcan Multi-CriteriaAdaptive Control Algorithms
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Delcan Multi-CriteriaAdaptive Control Algorithms
� Maximize ‘Green Bandwidth’
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Delcan Multi-CriteriaAdaptive Control Algorithms
� Minimize Vehicle Stops
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Delcan Multi-CriteriaAdaptive Control Algorithms
� Minimize Vehicle Stops & Delays
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Delcan Multi-CriteriaAdaptive Control Algorithms
� Manage Vehicle Queues
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Delcan Multi-CriteriaAdaptive Control Algorithms
� Prevent Upstream
Intersection Blocking
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Delcan ASCT Software Architecture
UTC - Configuration
- Operational
- Historical
- MIB Data
Multi-Criteria Adaptive
Control
Algorithm #N
Algorithm #2
Algorithm #1
MAC Central Server
Database
NTCIP
TLC
Intelligent
VDC
Loop
NTCIP
Central
Interface I
n
t
e
r
f
a
c
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F
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l
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f
a
c
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MAC
Local
Manager
I
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t
e
r
f
a
c
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S
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m
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l
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r
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Traffic Data
Simulator
(Testing Only)
MAC Adapter
NTCIP
Dig I/O
NTCIP/
Native
MAC Field Interface
Module
Web Interface
Service
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Surrey Pilot Project System Layout
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Surrey Pilot Project System Layout
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Surrey Pilot Project System Layout
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Surrey Pilot Project Detector Layout
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Intersection at 128 Street
� Initial Cycle Parameter Set Implemented:
– Algorithm: Medium Traffic
– Cycle Length: 90 s
– Phase Splits: 25 s EW / 40 s NS
Adaptive Control in AM Peak Period
� Peak Cycle Parameter Set Implemented at 8:35 am
– Algorithm: Heavy Traffic
– Cycle Length: 102 s
– Phase Splits: 35 s EW / 42 s NS
� Cycle Length Variation Step: +/- 6 s
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Pilot System Screen CaptureAM Peak – 90 Second Cycle
Red Coloured
Symbols
Represent High
Degree
21
Degree
of Saturation
Values
Pilot System Screen CaptureAM Peak – 102 Second Cycle
Light Colours
Symbolize Low
Degree of
Saturation Values
Reflecting Adaptive
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Reflecting Adaptive
Algorithm Efficiency
� Illustrative Example of Efficient Management of
Heavy Traffic during Special Events using ASCT
� Test Case: 2 August, 2012
– PM Peak extended by Ramadan Celebration
Adaptive Control in PM Peak Period
– PM Peak extended by Ramadan Celebration
– Mosque Located Close to one of Test Intersections
� Traffic Detected: from 35 veh / cycle (at 90 s)
to 110 veh / cycle (at 120 s)
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� Test Conducted between 3:00 pm and 8:30 pm
� Initial Cycle Parameter Set Implemented:
– Algorithm: Medium Traffic
– Cycle Length: 90 s
– Phase Splits: 20 s EW / 45 s NS
Adaptive Control in PM Peak Period
– Phase Splits: 20 s EW / 45 s NS
� Peak Cycle Parameter Set Implemented at 5:35 pm
– Algorithm: Heavy Traffic
– Cycle Length: 120 s
– Phase Splits: 45 s EW / 43 s NS
� Cycle Length Variation Step: +/- 6 s24
Pilot System Screen CapturePM Peak – 120 Seconds Cycle
Light Colours
Symbolize Low
Degree of
Saturation Values
Reflecting
Adaptive
Algorithm
25
Algorithm
Efficiency
Adaptive Control in PM Peak
400
450
500
110
115
120
125
Vehic
les (veh / c
ycle
)
Cycle
Length
[seconds]
Total Volumes vs. Cycle Length at 72 Ave. & 122 St.in Surrey BC, on August 2, 2012