PTV VISUM BIG DATA IN TRANSPORT MODELLING OCTOBER 2016 · PTV VISUM –BIG DATA IN TRANSPORT...
Transcript of PTV VISUM BIG DATA IN TRANSPORT MODELLING OCTOBER 2016 · PTV VISUM –BIG DATA IN TRANSPORT...
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www.ptvgroup.comwww.ptvgroup.com
PTV VISUM – BIG DATA IN TRANSPORT MODELLING
OCTOBER 2016
Data Hungry
Models
Getting
Started Faster
Big Data Use
Case:
Abu Dhabi
Real-timeDemand Data
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OUR VISION
WE PLAN AND OPTIMISE
EVERYTHING WORLDWIDE WHICH
MOVES PEOPLE AND GOODS.
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OVER 2,000 CLIENTS LOCATED IN 105 COUNTRIES
Key Clients
• Public Authorities (TfL, DfT, HE, West Midlands etc)
• Consultants (Aecom, Atkins, Arup, Jacobs, PBA, etc)
• Universities (Imperial, UCL, Napier, Newcastle)
• Public transport operators
• Road operators
• Airport operators
• Vehicle manufacturers
• Architects & Developers
• Research institutions
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Network modelling – large scale, national, regional and local
transport network developments and demand modelling
PTV VISION SOFTWARE SUITE
Detailed microscopic modelling of individual vehicles covering
all modes of transport – multi-modal micro-simulation
Advanced microscopic pedestrian simulation, both inside and
outside buildings
Real-time traffic simulation model, based on offline strategic
model (PTV Visum), fused with real-time data
Online traffic signal adaptive network control – model-based
A solution for all traffic analysis needs
In
terc
on
ne
cte
d
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MODELS ARE DATA HUNGRY
Road network
Transit network
Demand model
Map data (links / nodes)
Junction info (e.g. type, signal data)
Traffic/passenger counts
OD demand & surveys
Behavioural surveys
Land use data
Growth projections
Fare systems
Timetables
Stop locations
Delay-functions
Parking data
Road info (e.g. speed limits, lanes)
Journey times
Interchanges
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GETTING STARTED FASTER
Road network
Transit network
Demand model
Map data (links / nodes)
Junction info (e.g. type, signal data)
Traffic/passenger counts
OD demand & surveys
Behavioural surveys
Land use data
Growth projections
Fare systems
Timetables
Stop locations
Delay-functions
Parking data
Road info (e.g. speed limits, lanes)
Journey times
Interchanges
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GETTING STARTED FASTER - MAPS
PTV can supply map data in Visum
format from a variety of sources:
OSM (free, self-import)
TomTom
HERE
Shapefile import
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GETTING STARTED FASTER - TRANSIT
PTV Visum can interface with a variety
of transit data specifications and
scheduling software:
General Transit Feed Specification
UK ATCO CIF
RailML
VDV 452
Hafas
Cube/TransCAD/EMME etc.
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GETTING STARTED FASTER - TRANSIT
https://www.theguardian.com/cities/2014/feb/19/cities-motion-how-we-mapped-matatus-Nairobi
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GETTING STARTED FASTER – GPS TRAJECTORIES
PTV Visum can automatically import GPS
trajectories (GPX format) and snap to the
underlying network
Information can then be used to create
new network attributes such as speeds or
elevation.
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GETTING STARTED FASTER – SPEED PROFILES
PTV can supply historical speed profiles
with map data in Visum format from a
variety of sources (GPS and Cell):
TomTom
INRIX
HERE
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BIG DATA USE CASE – ABU DHABI OPERATIONS MODEL
Policy and
Strategy
Data
Analytics &
Visualisation
Traffic
EngineeringFreight
PT Planning
&
Optimisation
Revenue
ForecastingSustainability
ABU DHABI
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BIG DATA USE CASE – ABU DHABI OPERATIONS MODEL
Operations Model
Event management
(Big) data hub
Studying road/junction improvements
Quick assessment of LOS, queues and delays
Bus lane/operations
Multi-resolution modelling
Current / opening
year scenarios
Optima first steps
Junction modelling
Greater accuracy
Constant refresh
Export to microsimulation
Shorter runtimes
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BIG DATA USE CASE – ABU DHABI OPERATIONS MODEL
Extract data from Strategic
Model
Network
Zoning system
Present-year forecast (2015) demand
Demand segmentation
Fuse data sources and
increase model granularity
Merge with HERE maps to get ‘best of both’
Process observed data: radar/video/taxi GPS
Code junction geometries from satellite photography
Process signals from controller data
Import public transport supply
Build automation tools
Network matcher
Signal plan converter
Count extractor
TFF-engine*
Calibrate
Harmonise data from different sources
TFF-engine*
Vissim export
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BIG DATA USE CASE – ABU DHABI OPERATIONS MODEL
TFF
“Intelligent” chop of
worse measurements
Assignment (LUCE, no ICA)
Assignment (ICA)
TFF
Ok?“Intelligent” chop of
worse measurements
Stable
demand
Assignment (ICA)
Results
Ok?
Stable
demand
no
no
yes
yes
no
no
yes
yes
Stage 1: Matrix estimation to adjust demand
to better match observed counts, without
junction modelling and therefore based on
‘demand’ flows.
Faster
Good approx. before starting calibration
with junction modelling
Stage 2: As above, now with junction
modelling incorporated in to the assignment.
Added complexity of queueing and flow
metering, i.e. can increase flow
downstream by unlocking congestion
Intelligent chopping examines conflicts
and ‘self heals’
Completely automated process
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BIG DATA USE CASE – ABU DHABI OPERATIONS MODEL
STANDARD FUNCTIONS AVAILABLE THROUGH GUI
WRITE PYTHON / VB SCRIPT DIRECTLY WITHIN VISUM
RUN PYTHON / VB SCRIPT FROM EXTERNAL FILES
CONTROL VISUM USING VBA
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GETTING STARTED FASTER
Road network
Transit network
Demand model
Map data (links / nodes)
Junction info (e.g. type, signal data)
Traffic/passenger counts
OD demand & surveys
Behavioural surveys
Land use data
Growth projections
Fare systems
Timetables
Stop locations
Delay-functions
Parking data
Road info (e.g. speed limits, lanes)
Journey times
Interchanges
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DEMAND DATA
TRANSITHIGHWAY
Intercept surveys
GPS data
Mobile phone data
Household interviews On-board surveys
Census data
(e-)ticketing data
Stop-surveys
Demand models
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DEMAND DATA – DEMAND MODELS
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DEMAND DATA – TRANSIT TRAJECTORIES
PTV Visum can automatically import raw
data survey or e-ticketing data, each
record describing one passenger trip
from entry station to exit station
Reconstructs the trip in detail within the
network (so-called direct assignment)
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DEMAND DATA – TRANSIT TRAJECTORIES
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DEMAND DATA – TRANSIT TRAJECTORIES
Project to mine smartcard database for:
Deriving bus network
Identifying bus bunching/scheduling issues
Understanding passenger behaviour
Analysing bus capacity utilisation
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DEMAND DATA – GPS TRAJECTORIES
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DEMAND DATA – MOBILE PHONE TRAJECTORIES
ACTIVE (call, text, data)
Analyzing cell phone location data for urban travel: current methods, limitations and opportunities. Çolak,
Alexander, Alvim, Mehndiretta, González, 2014
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DEMAND DATA – MOBILE PHONE TRAJECTORIES
Generating Trajectories from Mobile Phone Data. Schlaich, Otterstätter, Friedrich, 2009
PASSIVE (standby)
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DEMAND DATA – MOBILE PHONE USE CASE
Interim Mobile
Phone
Matrices
Prior Matrices
V1
Vehicle Class
Segmentation
Journey
Purpose
Segmentation
Prior Matrices
V2
Prior Matrices
V3
Matrix Verification in VISUM
National
Vehicle Type
Split Data
NTEM/NTS
Data
NTEM/NTS
Census 2011
Trafficmaster
OD
ANPR
Matrix Calibration (Matrix Estimation using Screenlines/Counts as per WebTAG Criteria) and Model Validation
Verification in
VISUM
VISUM Trip
RetimingRelevant Trip
Identification
VISUM Zone
Conversion
Further Matrix
Refinement
VISUM
TFlowFuzzyFix TLD
Final Prior OD
Matrices
Mobile Phone
Usage Data
Identification
of Trips
Identification
of Home and
Work
Exclusion of
Non Highway
Modes
Expansion
Process
Stochastic
Rounding
Process
Interim Mobile
Phone
Matrices
PROCESSED BY MNOs
PROCESSED IN
VISUM
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DEMAND DATA – MOBILE PHONE DATA SUMMARY
Pros
Incredibly rich
Multi-modal
Cons
Lack of population segmentation
Lack of short-distance trips
Conclusion
Greatly improves OD matrices for many modes, as with GPS
Demand models still required, at least for now, but RSIs could become obsolete
Network operator involvement required to process raw data in to usable OD matrices
Modeller needs to understand and accept the assumptions made
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GETTING STARTED FASTER
Road network
Transit network
Demand model
Map data (links / nodes)
Junction info (e.g. type, signal data)
Traffic/passenger counts
OD demand & surveys
Behavioural surveys
Land use data
Growth projections
Fare systems
Timetables
Stop locations
Delay-functions
Parking data
Road info (e.g. speed limits, lanes)
Journey times
Interchanges
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REAL-TIME DATA
PTV can supply real time data from a
variety of sources:
TomTom
INRIX
HERE
Coyote
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REAL-TIME FORECAST
DATA AMPLIFIER
DECISION SUPPORTDATA HUB
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REAL-TIME MODELLING
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360° SMARTPHONE APPS
Your City App
Real-time, multimodal travel planning
Citizen/tourist advice and alerts
Influence mobility behaviour
Shared mobilityGPX Importer
Smartcard Importer
Mobility Surveys
Live data: mobile phone, GPS, detectors
City intervention: diversions, special events
Continuous & real-time
Offline planning
Continuous & real-time
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CYCLING – LONDON CYCLE SUPERHIGHWAYS
https://www.youtube.com/watch?v=Thyy2-J-BFw
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USEFUL LINKS
PTV Vision Website
http://vision-traffic.ptvgroup.com/en-uk/products/
PTV Vision Youtube Site
https://www.youtube.com/user/ptvvision
PTV Vision Webinars and Tutorials
http://vision-traffic.ptvgroup.com/en-uk/community/webinars/
Trial licences can be downloaded directly from:
http://vision-traffic.ptvgroup.com/en-us/products/ptv-vissim/
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CONTACT DETAILS
Devrim KaraDirector UK & IrelandPTV UKWellington House, Starley WaySolihull, B37 7HB, UK
Mobile: +44 7557 942 614
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www.ptvgroup.comwww.ptvgroup.com