The user can choose to run a hybrid simulation with certain parts being mesoscopic and others being microscopic. EnViVer Pro EnViVer Pro is a tool used to calculate emissions based on vehicle record data. It is based on the microscopic exhaust gas/emission model VERSIT+ by TNO. This model is based on data collected from. Has been removed. Legion for Aimsun will still use a fixed 0.6 second timestep, but the microsimulation model hosting the Legion pedestrians can now be configured to use any timestep length. Mesoscopic simulator Multi-threaded Mesoscopic Simulation Mesoscopic simulation is now able to use multiple threads in a CPU and hence run faster in large.
From Wikipedia, the free encyclopedia
Developer(s) | TSS- Transport Simulation Systems |
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Stable release | Aimsun 6.0.4 / |
Operatingsystem | MicrosoftWindows 2000, Microsoft WindowsXP, MicrosoftWindows Vista |
Type | Traffic simulation, Computer-aidedengineering software, traffic engineering, transportation planning, emergencyevacuation |
License | Software licenseagreement |
Website | http://www.aimsun.com |
Aimsun is an integrated transport modellingsoftware, developed and marketed by TSS- Transport Simulation Systems based in Barcelona, Spain.
Aimsun software is used by government agencies, municipalities,universities and consultants worldwide for trafficengineering, traffic simulation, transportation planning and emergencyevacuation studies. It is used to improve road infrastructure,reduce emissions, cut congestion and design urban environments forvehicles and pedestrians.
The latest version of Aimsun (6.0.4) was released in April2009.
Aimsun is currently one of the market leaders in transportsimulation software with over 1,400 users in 55 countries[1]. It isalso used for real-time, online traffic forecasting as Aimsun Online.
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Productfeatures
Aimsun 6.0.4 integrates three types of transport models(macroscopic, mesoscopic and microscopic) into one softwareapplication. This allows for the 2D and 3D visualisation oftransport scenarios in major world cities at detailed and highlevels.
Macroscopic statictraffic assignment
Capabilities include assigning traffic onto a network at amacroscopic level, adjusting Origin-Destination (O/D) matrices toreflect real-world data, and the evaluation and recommendation ofdetector layout and locations.
Mesoscopicsimulation
Used by practitioners to model dynamic aspects of very largenetworks. Aimsun software combines simplified car-following andlane changing for quicker simulation with detailed microscopicmodelling of key events and sections.
Microscopic simulation
Features include detailed car-following and lane changingmodels, real-world calibrated parameters and scalablesimulation.
Dynamic trafficassignment
Two different schemes can be used for mesoscopic or microscopicsimulation based on statistical distribution or driver selectedroutes.
Vehicle-pedestriansimulation
Aimsun integrates with pedestrian simulation software Legion tosimulate traffic within the Legion environment. A Legion plug-infor Aimsun is currently being developed to move pedestrians insideAimsun with Legion software.
Otherfeatures
Other features include:
- Creation of vehicle actuated signals
- Introduction public transport priority schemes
- Definition of traffic management strategies using triggers andactions
- Import, editing and manipulation of O/D data
- Management of scenarios, iterations and replications
- Production of outputs as images videos, tables or raw data
Compatibility
Aimsun can exchange data with CAD, GIS, transport modelling,signal optimisation and adaptive control software tools (DWG, DXF,DGN, GIS, Emme, CONTRAM, Saturn, CUBE, VISUM, VISSIM, Paramics,TRANSYT, SYNCHRO, VS-Plus, UTOPIA, SCATS).
Programming
Aimsun can be customised using Python, Qt and C++.
Licensing
Aimsun 6.0.4 is available in four editions: Small, Standard,Professional and Advanced.
Versionhistory
Aimsun 6.0.4 was released on 22 April 2009.
Practicaluses
- Impact analysis of infrastructure design
- Environmental studies andcreation of green zones
- Toll, road pricing and congestioncharging
- Control plan and signal optimisation
- Urban and interurban traffic demand management
- Support system for public transport management
- Safety analysis and emergency evacuation planning
Externallinks
- Aimsun YouTubedemonstration
Literature
- The role of simulation in advanced traffic managementsystems, in: Proc. of the 7th World Conf. on ITS, Torino,Barceló, J.: 2000.
- GETRAM/AIMSUN: A software environment for microscopictraffic analysis, in: Proc. of the Workshop on Next GenerationModels for Traffic Analysis, Monitoring and Management, Tucson, AZ,September, Barceló, J.: 2001.
- The use of neural networks for short-term prediction oftraffic demand, in: A. Zeder (ed.), Transportation and TrafficTheory, Pergamon, Barceló, J. and Casas, J.: 1999.
- Dynamic network simulation with AIMSUN, Preprints ofthe Proc. of the Internat. Symposium on Transport Simulation,Yokohama, Kluwer, in press, Barceló, J. and Casas, J.: 2003.
- Analysis of dynamic guidance systems by microsimulationwith AIMSUN2, in: Proc. of the 6th World Conf. on ITS,Toronto, Barceló, J., Casas, J., and Ferrer, J. L.: 1999a.
- Modeling advanced transport telematic applications withmicroscopic simulators: The case of AIMSUN2, in: W. Brilon, F.Huber, M. Schreckenberg and H. Wallentowitz (eds), Traffic andMobility, Simulation, Economics, Environment, Springer, Berlin,Barceló, J., Casas, J., Ferrer, J. L., and García, D.: 1999b.
References
- ^Aimsun userstatistics
Developer(s) | Aimsun |
---|---|
Stable release | |
Type | Traffic forecasting, transportation forecasting, road traffic control, congestion planning |
License | Software license agreement |
Website | http://www.aimsun.com |
Aimsun Live is a simulation-based traffic forecasting solution, developed and marketed by Aimsun.
Traffic control centres use Aimsun Live (formerly Aimsun Online) to make real-time decisions about the management of a road network. It is used to dynamically forecast future traffic conditions based on the current state of the network and to evaluate incident response or traffic management strategies.
Aimsun Live slots right into the traffic control centre and continuously processes live field data, simulating vehicle movement inside a road network of any size, from a single highway corridor to an entire major world city. By combining these live traffic data feeds and high-speed simulations with emulation of congestion mitigation strategies, Aimsun Live can accurately forecast the future network flow patterns that will result from a particular traffic management or information provision strategy.
Aimsun Live was launched in 2008 and is now fully deployed in Interstate 15 in San Diego, Grand Lyon in France and other locations worldwide.
- 1Product features
- 1.3Real-time simulation
Product features[edit]
Aimsun Live uses live traffic data feeds and simulations to forecast future traffic conditions for large urban areas and regional networks.
Real-time analysis[edit]
Aimsun Live analyses real-time inputs from disparate sources of information, such as field traffic controllers, detectors, incident reports and live data feeds from key intersections.
Calibrated model retrieval[edit]
Using up-to-date field data, Aimsun Live identifies, retrieves and loads a travel demand matrix of the road network being managed. It finds the closest match between the data received in real time from among several demand patterns stored in a database. The demand pattern database is created in a prior step by carrying out analysis of historical data.
Real-time simulation[edit]
This step involves dynamic (mesoscopic or microscopic) simulation of one or more scenarios in real time. Each scenario is simulated on a dedicated computer. The simulations produce dynamic forecasts of traffic conditions at a detailed, local level for the next 30-60 minutes. Each simulation considers a concrete set of actions that might be applied in order to improve the network situation. One of the scenarios always corresponds to the ‘do nothing' case.
The area included in the simulation model depends on the type of network being managed. It is typically defined using equilibrium assignment techniques which evaluate at a high level the impact of local but significant capacity changes on the rest of the network. The objective is to exclude areas that are unlikely to be affected by incidents or responses to those incidents.
Simulations typically last 1-3 minutes [1] depending on hardware specifications, network size and level of congestion (number of vehicles). These simulations are run in 'batch mode' (without animation in 2D or 3D) in order to improve performance.
Online visualisation[edit]
Response information is presented visually online to provide support for operational decision making. Traffic control operators are provided with quick snapshots of predicted traffic flow and performance indicators for different control alternatives.
Other features[edit]
- Customization to work with traffic control software
- Assimilation of new data to improve quality of predictions over time
Practical uses[edit]
- Online travel information systems
- Dynamic emergency vehicle routing
- Emissions management
- Accident response strategy assessments
- Urban and interurban congestion management
- Security threat mitigation and large-scale evacuation management
Project examples[edit]
![Aimsun Mesoscopic Model Aimsun Mesoscopic Model](/uploads/1/2/5/6/125661553/249757226.png)
Aimsun Live is or has been used to inform operational decisions for:
- Integrated Corridor Management Project on Interstate 15, San Diego, CA [2] The Intelligent Transportation Society of America (ITS America) awarded this project the Best Innovative Practices Award in the 2013 Best of ITS awards competition.
- Singapore City Centre
- Grand Lyon
- M30, Madrid, Spain [3]
Literature[edit]
- Traffic operations: Thinking ahead, Traffic Technology Today, Torday, A and Gerodimos, A.:17 Apr 2009[permanent dead link]
References[edit]
- ^Simulation times from Madrid, M30, project
- ^'Project overview and links'. Archived from the original on 2014-02-23. Retrieved 2014-02-12.
- ^Report from European Transport Conference 2008
External links[edit]
Retrieved from 'https://en.wikipedia.org/w/index.php?title=Aimsun_Live&oldid=862592339'