sa roads summitv2
TRANSCRIPT
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Traffic control and signal modellingin the Capital
A 2020 approach in 2010
Jason Robinson, TfL Traffic - Network Performance
Gavin Jackman, TRL
Roads Summit, January 2010
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Through Londons use of technology we will
give insight to:
Latest developments in modelling packages and use
Linking modelling and traffic control systems together
Using software to evaluate the benefits of SCOOT
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Network Development
Situational
Awareness
Real time Network Monitoring
Information Exchange
Network Management
Planning dataFor TfL
Guidance and adviceFor the Public
OperationalIntelligence
Analysis & Modelling
Data Management
Dynamic Network
Management
A Vision Operational Intelligence
Delivered through an ITS Architecture...
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Network Monitoring
Data Management
Analysis &
Modelling
Network Management
Traffic Control
Information Exchange
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Now Future (stepping stones)
UTC +
Modelling
2008
Intelligence
OfflineInterfaces
2009 /2010
Online
Interfaces2011/2012
Real-timePrediction
2013 onwards
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Integrating Control and Modelling
Case Study - TfL SCOOT Benefits, validated by TRLUsing the UTC (SCOOT) VISSIM Interface
Quantifying travel time and emissions reductions
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How SCOOT Works
Online Model
every second24/7
GPSloop
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Tavistock Place (R52) 4 junctions Corridor
Victoria (R7) 12 junctions 2 pelicans Grid network
Operational Network Evaluator (ONE) Model
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How the UTC-VISSIM Interface Works
VISSIM Detectors provideOccupancy data, in same way as
SCOOT loops
VISSIM replicates thestreet
VISSIM detectorsprovide flow data or
other inputs
SCOOT optimisestimings and updatesVISSIM
Currently offlineenvironment
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SCOOT Benefits Analysis
Comparison of Fixed Time v SCOOT control
Typical conditions
Traffic incident conditions
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Operational Benefits
Vehicle stops and delays were all reduced withSCOOT active.
Delay Stops
Victoria 12% 10%
Tavistock Place 14% 8%
Delay Stops
Victoria, all
scenarios11 - 16% 10 - 17%
Tavistock Place,
all scenarios8 - 29% 6 - 25%
Table 1 Base Flow SCOOT Benefits Table 2 Summary SCOOT Benefits
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1. Static NetworkHistoric Network Capacity and Demand
ONE Model (VISUM) VISSIM
2. Dynamic Demand Modelling
Synthesised flow with real-time data
3. Intelligent Traffic Systems
Real time traffic capacity information
4. Real-time Situational Awareness
ONE-online: real-time intelligent trafficanalysis and forecasting
Online Modelling Situational Awareness
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A Vision Operational Intelligence
Network Development
Situational
Awareness
Real time Network Monitoring
Information Exchange
Network Management
Planning data
For TfL
Guidance and advice
For the Public
OperationalIntelligence
Analysis & Modelling
Data Management
Dynamic NetworkManagement
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tfl.gov.uktrl.co.uk
[email protected]@tfl.gov.uk
mailto:[email protected]:[email protected]:[email protected]:[email protected]