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Similar to Transport Modelling Workshop Software Innovation
Transport Modelling Workshop Software Innovation
- 1. www.ptvgroup.com I Slide1 www.ptvgroup.com TRANSPORT MODELLING WORKSHOP SOFTWARE INNOVATION
- 2. www.ptvgroup.com I Slide2 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 Slide3 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 Slide4 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 Slide5 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
- 6. www.ptvgroup.com I Slide6 6 CURRENT CPB PARTNERS OECD ITF – SHARE AUTONOMOUS VEHICLE PROJECT
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- 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 requiredto 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 requiredto 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 requiredto 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 Slide15 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 Slide16 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 Slide17 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 Slide18 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
- 19. www.ptvgroup.com I Slide19 PTV VISWALK 9 – ELEVATORS
- 20. www.ptvgroup.com I Slide20 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 Slide21 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 Slide22 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 Slide23 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
- 24. www.ptvgroup.com I Slide24www.ptvgroup.comwww.ptvgroup.com
Editor's Notes
- #4 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
- #5 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.
- #6 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.
- #7 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
- #11 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.
- #14 Nearly the same mobility can be delivered with 10% of the cars
- #16 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.
- #17 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.
- #18 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.