transport modelling workshop software innovation

Introduction to PTV Vissim

www.ptvgroup.com

Transport modelling workshopSoftware innovation

www.ptvgroup.comI Slide #

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Traffic VISION SUITE

Qualitative collection and validationof accident data

Offline Real-time ROAD SafetyAdvanced microscopic pedestrian simulation, both inside and outside buildings

Network modelling large scale, national, regional and local transport network developments and demand modellingTraffic 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 dataOnline traffic signal adaptive network control model-based


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PTV VISUM 16: simulation based assignmentNEW IN VISUM 16Innovation:Mesoscopic simulation used for network loadingMesoscopic Simulation:Uses the same science behind Mesoscopic simulation in VissimSimplified Car Following ModelInstant speedsJunctions modelled with signal control and gap acceptanceSignal offsets implicitly representedLane Selection ModelLink lanes have equal characteristics

www.ptvgroup.comI Slide #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 MesoThis means that SBA is closer to microsimulation than other mesoscopic methodsJust 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 frontJunctions are represented explicitly with individual vehicle movements, using the same junction editor as for ICASignal timings and offsets are therefore explicitly represented, and gap acceptance rules are applied whenever there are conflictsLane selection is made on entry to a link only, and not within a linkThe 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 linkIMPORTANT:This means that we can produce a result inside Visum that is almost identical to Vissim, ready for further analysis such as hybrid or microsimulationThe 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 end3

Vissim Meso/Operations Model

PTV Visum Macroscopic Model

Multi-resolution modellingVisum Meso/Operations Model

Hybrid/Microsimulation Model

Demand GranularityDemand model typeTraveller typesActivitiesModesTime Periods / 24hSupply GranularityAssignment methodTime Periods / 24hMulti-modalityZoning systemLink coverageJunction representationAssignment with ICAQuasi-dynamicLeast model dev. effortHybrid Meso/MicroMost expressive option3D visualisationJunction designAdaptive signalsAdaptive traffic mgmt.+++Simulation-Based Asgmt.DynamicSimulationModerate dev. effortHybrid Meso/MicroDynamicSimulationGreater dev. effort

www.ptvgroup.comI Slide #The development of SBA gives our users more options for multi-resolution modelling, allowing them to choose the approach that is right for their needsAt the macroscopic level, PTV Visum is most advanced and most used solution in the worldAt the microscopic level the same holds true for PTV Vissim its 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 microsimulationThe 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. 4

Ptv visum 16shared mobility

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B

New station objectCapacityCR functionRenting costSharing legTime user definedKeep renting and go to zoneReturn vehicle to stationReturn vehicle to stationNEW IN VISUM 16

www.ptvgroup.comI Slide #Visum already has the most advanced public transport functionality of any macro tools due to collaboration with DB over the last few decadesThis is being extended further to allow for sharing systems such as bike or car sharingCities, 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.5

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CURRENT CPB PARTNERS OECD ITF SHARE AUTONOMOUS VEHICLE PROJECT

www.ptvgroup.comI Slide #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 scale6

real city

real* trips

real* routes

TaxiBotride-sharing

AutoVotcar-sharing

Public TransportHigh-Capacity

Shared autonomous Vehicles?

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.10

all day vs. peak hours

24hrs.

peakhrs.maximum delay from base case trips

5 minutesWhat we wanted to Test

number of vehicles required to provide the same trips as before:

peakhrs.WHAT WE WANTED to test

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24hrs.

TaxiBotsRide-sharing

Public transport(high capacity)

number of vehicles required to provide the same trips as before:10%

Scenario: 24 hours+

24hrs.THE IMPACT ON VEHICLE NUMBERS



Nearly the same mobility can be delivered with 10% of the cars13

number of vehicles required to provide the same trips as before:35%

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peakhrs.THE IMPACT ON VEHICLE NUMBERS



Ptv visum EUROPEAN TRANSPORT MODEL overview

European CommissionStrategic planning modelAll 28 EU member states and surrounding countriesInform investment decisions for European freight and passenger corridorsBetter coordination and planning decisionsE.g. how would a new rail link through Siberia affect the cost of moving goods from China?E.g. fuel prices, emissions

www.ptvgroup.comI Slide #This model is paid for by the European Commission and is to be used for strategic planningIt will cover all 28 member states and surrounding countries.This will be a complex model, linking transport with the economy and energyThere will be a feedback loop between these models and will include a detailed international freight moduleOne 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.

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PTV OPTIMA public transportNEW FUNCTIONALITY

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.

www.ptvgroup.comI Slide #Optima is our real time traffic forecast solutionImplementing 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.16

360 smartphone appsYour City AppReal-time, multimodal travel planningCitizen/tourist advice and alertsInfluence mobility behaviourShared mobility

GPX ImporterSmartcard ImporterMobility SurveysLive data: mobile phone, GPS, detectorsCity intervention: diversions, special eventsContinuous & real-timeOffline planningContinuous & real-time

www.ptvgroup.comI Slide #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.17

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 featuresNEW IN VISSIM 9


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PTV VisWALK 9 ELEVATORSNEW IN VISWALK 9


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UK Department for Transport commissioned study to simulate the impacts Connected Autonomous Vehicles (CAVs) may have on traffic flow and capacity.Atkins consultants created a number of Vissim models to replicate conditions across the UKs trunk road network.COM Interface adopted to configure CAVs to change behavior according to the traffic situation.Considered whether CAVs would be more cautious in their behavior and the impact this has on road capacity.

Ptv Vissim autonomous vehicle modelling


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ptv vissim urban cycling schemesFCL 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.


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ptv vissim: mesoscopic simulation

Bridge ClosureBridge ClosureRoute of diverted traffic determined in meso through dynamic assignmentNetwork PerformanceDo alternative routes maintain sufficient Level of Service?Mitigation MeasuresAre temporary mitigation measures required to accommodate additional traffic flow?Scenario ManagementPerformance across multiple scenarios (AM, PM) and modifications (mitigations etc)SolutionOptimal solution identified based on achieving balanced network


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Ptv group - beta testingEarly access to pre-release versions of the software.Members will get:Hands on experience of new features before anyone elseChance to influence developmentChance to work more closely with PTV development team

Download from: http://your.visum.ptvgroup.com/Betatest2016


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