2. www.ptvgroup.com I Slide 2
TRAFFIC – VISION SUITE
Qualitative collection and validation
of accident data
OFFLINE REAL-TIME
ROAD SAFETY
Advanced microscopic pedestrian
simulation, both inside and outside
buildings
Network modelling – large scale,
national, regional and local transport
network developments and demand
modelling
Traffic impact analysis and signal
timing optimisation
Detailed microscopic modelling of
individual vehicles covering all modes
of transport – multi-modal micro-
simulation
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
3. www.ptvgroup.com I Slide 3
PTV VISUM 16: SIMULATION BASED ASSIGNMENT
Innovation:
Mesoscopic simulation used for
network loading
Mesoscopic Simulation:
Uses the same science behind
Mesoscopic simulation in Vissim
Simplified Car Following Model
Instant speeds
Junctions modelled with signal
control and gap acceptance
Signal offsets implicitly represented
Lane Selection Model
Link lanes have equal characteristics
4. www.ptvgroup.com I Slide 4
Vissim Meso/Operations Model
PTV Visum Macroscopic Model
MULTI-RESOLUTION MODELLING
Visum Meso/Operations Model Hybrid/Microsimulation Model
Demand Granularity
Demand model type
Traveller types
Activities
Modes
Time Periods / 24h
Supply Granularity
Assignment method
Time Periods / 24h
Multi-modality
Zoning system
Link coverage
Junction representation
Assignment with ICA
Quasi-dynamic
Least model dev. effort
Hybrid Meso/Micro
Most expressive option
3D visualisation
Junction design
Adaptive signals
Adaptive traffic mgmt.
+++
Simulation-Based Asgmt.
Dynamic
Simulation
Moderate dev. effort
Hybrid Meso/Micro
Dynamic
Simulation
Greater dev. effort
5. www.ptvgroup.com I Slide 5
PTV VISUM – 16…SHARED MOBILITY
A
B
New ‘station’ object
Capacity
CR function
Renting cost
‘Sharing’ leg
Time user defined
Keep renting and go to zone
Return vehicle to station
Return vehicle to station
11. all day vs. peak hours
24hrs.
peak hrs.
maximum delay
from base case trips
5
minutes
WHAT WE WANTED TO TEST
12. number of vehicles
required to provide
the same trips as
before:
24hrs.
peakhrs.
WHAT WE WANTED TO TEST
+
24hrs.
TaxiBots
Ride -sharing
Public transport
(high capacity )
13. number of vehicles
required to provide
the same trips as
before: 10%
Scenario: 24 hours
+
24hrs.
THE IMPACT ON VEHICLE NUMBERS
TaxiBots
Ride -sharing
Public transport
(high capacity )
14. number of vehicles
required to provide
the same trips as
before: 35%+
peakhrs.
THE IMPACT ON VEHICLE NUMBERS
TaxiBots
Ride -sharing
Public transport
(high capacity )
15. www.ptvgroup.com I Slide 15
PTV VISUM – EUROPEAN TRANSPORT MODEL – OVERVIEW
European Commission
Strategic planning model
All 28 EU member states and surrounding countries
Inform investment decisions for European freight and
passenger corridors
Better coordination and planning decisions
E.g. how would a new rail link through Siberia affect the
cost of moving goods from China?
E.g. fuel prices, emissions…
16. www.ptvgroup.com I Slide 16
PTV OPTIMA – PUBLIC TRANSPORT
Current ETA generally based on
statistical approach.
Lack of real time information on
impact of different modes on each
other.
Optima PuT predicts future effects
for the next stops and evaluates
alternative strategies.
Provide reliable, on-time, PuT
information to commuters and
visitors.
ETA for all lines and alerts for
predefined missing interchanges.
Real time passenger flow for
forecast about PuT occupancy.
17. www.ptvgroup.com I Slide 17
360° SMARTPHONE APPS
Your City App
Real-time, multimodal travel planning
Citizen/tourist advice and alerts
Influence mobility behaviour
Shared mobility
GPX Importer
Smartcard Importer
Mobility Surveys
Live data: mobile phone, GPS, detectors
City intervention: diversions, special events
Continuous & real-time
Offline planning
Continuous & real-time
18. www.ptvgroup.com I Slide 18
Focused on usability and speeding
up the modelling process.
Additions to Scenario Management
which allows comparison of results
graphically.
Matrices are included within the
GUI rather than being read in
externally.
Background maps available in 3d
mode.
Network checking prior to
simulation run.
HCM results for nodes.
PTV VISSIM 9 – NEW FEATURES
20. www.ptvgroup.com I Slide 20
UK Department for Transport commissioned study to
simulate the impacts Connected Autonomous
Vehicles (CAV’s) may have on traffic flow and
capacity.
Atkins consultants created a number of Vissim
models to replicate conditions across the UK’s trunk
road network.
COM Interface adopted to configure CAV’s to
change behavior according to the traffic situation.
Considered whether CAV’s would be more cautious
in their behavior and the impact this has on road
capacity.
PTV VISSIM – AUTONOMOUS VEHICLE MODELLING
21. www.ptvgroup.com I Slide 21
PTV VISSIM – URBAN CYCLING SCHEMES
FCL ETH in partnership with PTV developing a cycling simulator;
Explore VR as a new tool for transport and urban planning;
Develop street designs that are responsive to future forms of mobility;
PTV Vissim as the traffic simulator;
ESRI City Engine as design configurator;
Unity as gaming engine.
22. www.ptvgroup.com I Slide 22
PTV VISSIM: MESOSCOPIC SIMULATION
Bridge Closure
Bridge Closure
Route of diverted traffic determined in meso
through dynamic assignment
Network Performance
Do alternative routes maintain sufficient
Level of Service?
Mitigation Measures
Are temporary mitigation measures required
to accommodate additional traffic flow?
Scenario Management
Performance across multiple scenarios (AM,
PM) and modifications (mitigations etc)
Solution
Optimal solution identified based on
achieving balanced network
23. www.ptvgroup.com I Slide 23
PTV GROUP - BETA TESTING
Early access to pre-release versions of the
software.
Members will get:
Hands on experience of new features before
anyone else
Chance to influence development
Chance to work more closely with PTV
development team
Download from:
http://your.visum.ptvgroup.com/Betatest2016
A key feature of Visum 16, released this year, is the new simulation-based dynamic assignment:
A key aspect of this assignment is that the network loading stage is made using the same mesoscopic simulation behind Vissim Meso
This means that SBA is closer to microsimulation than other mesoscopic methods
Just like in Vissim, the simulation is based on the a simplified car following model:
Furthermore:
Vehicles travel at their desired speeds unless impeded by the vehicle in front
Junctions are represented explicitly with individual vehicle movements, using the same junction editor as for ICA
Signal timings and offsets are therefore explicitly represented, and gap acceptance rules are applied whenever there are conflicts
Lane selection is made on entry to a link only, and not within a link
The choice of lane is based on lane density, taking into account that the lane must enable the vehicle to remain on its route at the end of link
IMPORTANT:
This means that we can produce a result inside Visum that is almost identical to Vissim, ready for further analysis such as hybrid or microsimulation
The benefit of this approach rather than a single product is that we can benefit from world-leading macroscopic and microscopic simulation without needing to sacrifice quality at either end
The development of SBA gives our users more options for multi-resolution modelling, allowing them to choose the approach that is right for their needs
At the macroscopic level, PTV Visum is most advanced and most used solution in the world
At the microscopic level the same holds true for PTV Vissim – it’s connector structure allows for the most expressive and realistic representation of real traffic in the market.
And we now offer multiple options for mesoscopic modelling:
The option with least development effort, but also precision due to being a static approach, is Assignment with ICA. This method uses the HCM to calculate junction performance based on turning movements, conflicts and signal timings, and also represents blocking back and flow metering. It can therefore produce a capacity-constrained assignment that greatly improves the inputs to microsimulation
The next option is the new SBA method which produces almost identical results to Vissim Meso, but requires additional data collection and calibration effort than Assignment with ICA.
The third option is to drop directly in to Vissim Meso where users can make use of hybrid simulation and therefore benefit from the precision of microsimulation. This approach requires greater modelling effort than SBA, SBA can be used to develop bigger models, and with SBA users have the benefit of making use of the Visum data model for analysing matrices and routes etc.
Visum already has the most advanced public transport functionality of any macro tools due to collaboration with DB over the last few decades
This is being extended further to allow for sharing systems such as bike or car sharing
Cities, transit and sharing system operators can now test the most effective strategies and forecast the usage for such systems
Part of pt assignment and model and that model can have route with any public transport models, sharing car systems. Car sharing not ride sharing. Shared use of a pool of cars or bikes, can also be only that sharing system, cities can plan the best locations for the facilities.
In addition to standard modes can also use shared system.
PTV Group sit on the corporate partnership board of the International Transport Forum where PTV Visum was used to undertake a shared autonomous vehicle project at a macro scale
Taxi-bots are where travelers share time and space by travelling in the same car simultaneously.
AutoVots are where travelers use the same car sequentially, usually controlled by the owner or car fleet manager so it is a more private mode.
Nearly the same mobility can be delivered with 10% of the cars
This model is paid for by the European Commission and is to be used for strategic planning
It will cover all 28 member states and surrounding countries.
This will be a complex model, linking transport with the economy and energy
There will be a feedback loop between these models and will include a detailed international freight module
One particular challenge which will be solved and made available in a future release to all, is the complexity of certain routes. For example, it is quite feasbile for a traveller to use a complex mixture of modes such as rail, air, taxi and private car. These complex chains will be handled in a new assignment method.
Optima is our real time traffic forecast solution
Implementing Public Transport functionality
Currently (ETA) is based on too simple algorithms, usually only with a statistic approach”
“There is a lack of intermodal information on the impact of a transport system on another one (what happens if the bus is in delay and I miss the connection with the train?)”
Optima allows for the propagation of traffic conditions from real time data, allowing different management strategies to be tested.
This data can then be provided to commuters and visitors to provide a more realistic ETA forecast.
Can be adopted across all PT lines and interchanges where people may miss connections.
In the future we are looking to further develop into real time passenger flow data to provide commuters with info about current occupancy as well as for network planning.
An area PTV is also active in is Apps, and it is through Apps that we seek to complete the circle between people and planning.
PTV City App can be based on Optima therefore providing info on operational conditions and model based forecasting. The highlights are real-time traffic information and multimodal navigation for cars, public transport, bikes and pedestrians.
Adopted in Karlsruhe Germany users benefit from other information related to roadworks, parking spaces, park and ride options which are all combined with corresponding public transport timetables.
