Notas Técnicas – Aimsun Next 2018-01-17T12:52:33+00:00

Notas Técnicas Aimsun Next

Nesta página você encontrará publicações mostrando algumas dicas de como extrair o melhor do software Aimsun Next. Aprenda como gerar relatórios visuais, a operar entre os modelos Macro, Meso e Micro, a criar um experimento de modelo 4-etapas e outros assuntos interessantes…

Linhas de Retenção: como controlar precisamente sua posição em uma simulação microscópica

Nota Técnica #31 Março 2018 Por Mauricio Castro e Gabriel Funes When a turn has conflicts with other movements at an intersection, by default the vehicles that have to yield to traffic in any of the conflict areas along the turn will stop at the end of the inbound section. However, in microscopic simulations, you can control precisely where the vehicles should stop. Pushing back a stop position If you want to push back the stop position from the end of the section, you can set a stop line distance, which measures the offset of the stop line fr [...]

segunda-feira, 12 Março, 2018|Categorias: Aimsun, Notas Técnicas Aimsun|

Simulação Híbrida

Nota Técnica #30 Fevereiro 2018 Por Geline Canayon e Laura Torres A hybrid simulation concurrently applies the microscopic model in selected areas and the mesoscopic in the remainder of the network. The hybrid model is recommended for large-scale networks with specific areas that require a microscopic level of detail but with a global network evaluation. Using the hybrid model is beneficial for networks where changes or strategies that require precise knowledge of when a vehicle passes over a detector located inside a road section (such as ada [...]

segunda-feira, 5 Fevereiro, 2018|Categorias: Aimsun, Notas Técnicas Aimsun|

Funções de Distribuição e Divisão Modal

Nota Técnica #29 Outubro 2017 Por Margarida Delgado Since version 8.2 of Aimsun, the Distribution and Modal Split steps have been separated into two different processes, each with their own Scenario and Experiment. Each of these two steps needs its own set of two types of function: Figure 1 – Distribution functions and Modal Split functions Distribution The Distribution process implements a gravity model, where you need to specify (a function to model) the resistance for making a trip between each particular OD pair, given the (combined skim c [...]

terça-feira, 3 outubro, 2017|Categorias: Aimsun, Notas Técnicas Aimsun|

Usando Agrupamento de Centroides para Dividir Zonas

Nota Técnica #28 Agosto 2017 Por Dimitris Triantafyllos e Paolo Rinelli Did you know that you can use Groupings of Centroids to split zones? The following workflow shows how to split a centroid into multiple centroids and distribute the trips generated and attracted with user-defined proportions. A. NETWORK PREPARATION First, use the Table View to ensure that all Centroids have been given different External ID values so that you can paste the trip values from the original OD Matrix into the one with split zones. Figure 1. Verifying that all ce [...]

sexta-feira, 4 agosto, 2017|Categorias: Aimsun, Notas Técnicas Aimsun|

Função de Penalidade no Movimento

  Nota Técnica #27 Junho 2017 Por Dimitris Triantafyllos and Carles Illera Did you know that in Aimsun 8.2 you can now make use of a Turning Penalty Function (TPF) that perceives the costs from a control plan selected in the macro scenario? Did you ever use Junction Delay Functions (JDF) to model stop/yield signs during a static assignment? Below you will find examples of TPF and JDF functions that can be used at: Signalized intersections Yield/stop signs Signalised Intersections Aimsun 8.2 introduces the capability of the TPF to access t [...]

terça-feira, 13 junho, 2017|Categorias: Aimsun, Notas Técnicas Aimsun|

Usando Ações de Gerenciamento de Tráfego no Aimsun

Nota Técnica #26 Maio de 2017 Por Dimitris Triantafyllos e Sergi Pujadas Aimsun’s vehicle-based simulators offer several traffic management strategies that allow users to modify traffic network conditions, affect driver behaviour or simulate events in the traffic network. Traffic Management Strategies can be also used to model traffic congestion under either recurrent or non-recurrent traffic conditions. This technical note explains how to alleviate traffic congestion using the following traffic actions: A. Reserved Lane Deactivation B. Contro [...]

terça-feira, 2 Maio, 2017|Categorias: Aimsun, Notas Técnicas Aimsun|

Criando Excelentes Vídeos com o Gravador do Aimsun

Nota Técnica #25 Abril 2017 Por Laura Torres, Sergi Pujadas e Emmanuel Bert There are various ways to output results from an Aimsun model but one of the most accessible for non-technical audiences is a video recording of a simulation. Here are some tips for using the recording tool to make your videos as impressive as possible. Record Before you even start recording anything, it is important to set your preferences in the “Project Preference Editor”. Click to enlarge: Project Preference Editor Recording size Use standardized screen dimensions [...]

quinta-feira, 30 Março, 2017|Categorias: Aimsun, Notas Técnicas Aimsun|

Como Utilizar Conteúdo de Matriz

Nota Técnica #24 Março 2017 Por Marga Delgado Matrices have a field called Contents, where you can set the type of information that is stored: travel times, tolls, parking slots etc. Click to enlarge: Set the type of information that is stored You can use the Contents to group matrices into subfolders, which is particularly convenient when working with multiple matrices: Click to enlarge: Group matrices into subfolders Click to enlarge: Multiple matrices Aimsun uses the Contents to filter through all the matrices and find those that can be use [...]

quarta-feira, 8 Março, 2017|Categorias: Aimsun, Notas Técnicas Aimsun|

Ordenando Objetos na Janela de Projetos

Nota Técnica #23 Fevereiro 2017 Por Sara Pardo Non-graphical objects in Aimsun are listed in the Project Window by object type. By default, objects are listed in alphabetical order by name, however, in Aimsun you can customize the order of your objects for clearer and more semantic organisation. Here’s an example: Imagine that you have dozens of subpaths, each one identified by a name representing the main streets on their route. It might be useful to you to list them by, say, direction, e.g., Northbound, Westbound etc. As that attribute does [...]

sexta-feira, 10 Fevereiro, 2017|Categorias: Aimsun, Notas Técnicas Aimsun|

Modelando veículos conectados usando API Aimsun: Cooperative Adaptive Cruise Control

Technical Note #22 Janeiro 2017 Por Paolo Rinelli e Dimitris Triantafyllos Did you know that you can use the Aimsun micro Advanced Programming Interface (API) to model some connected vehicle applications, such as Cooperative Adaptive Cruise Control (CACC)? For this application, you need functions to: Read the state of a vehicle and that of the preceding vehicle (to check that the two are within the maximum communication range of the system and to read the information that would be transmitted between the two, such as: position, speed, accelera [...]

segunda-feira, 9 Janeiro, 2017|Categorias: Aimsun, Notas Técnicas Aimsun|

Como usar Sobreposição de Atributos

Nota Técnica #21 Dezembro 2016 Por Maud Chassat Along with the geometry configurations feature, which allows you to introduce modifications in the shape of your network within the same project file, overrides are useful for modifying attributes of existing objects. Here’s how to do it. Use Table View or manually select a set of objects for which you want to modify an attribute. Select the attribute that you want to modify from the drop-down menu, e.g., Maximum Speed in sections: Click to enlarge. Figure 1 – Select the objects and the attribute [...]

quarta-feira, 14 dezembro, 2016|Categorias: Aimsun, Notas Técnicas Aimsun|

A Ferramenta Agrupamento de Categoria (Parte 2): Screenlines

Nota Técnica #20 Novembro 2016 By Tamara Djukic You can use groupings of sections or detectors to define screenlines. Screenlines can be used for OD demand adjustment and for validation. Screenlines for OD demand adjustment Create a grouping category for detectors (or sections), and call it “screenlines” for convenience; inside, create a grouping for each screenline that you want to define. Open the groupings and select all the detectors (or the section) that you want to include in each screenline. In Figure 1, two detectors have been grouped [...]

quarta-feira, 16 novembro, 2016|Categorias: Aimsun, Notas Técnicas Aimsun|

A Ferramenta Agrupamento de Categoria (Parte 1): Como acessar dados de entrada e saída do modelo de forma eficiente

Nota Técnica #19 Outubro 2016 By Tamara Djukic With additional input from Timothy Lim and Phoebe Ho The diverse nature of traffic data often makes it slow and cumbersome to apply to calibration and validation of traffic models or simulation input and output data processing. The Aimsun Grouping Category tool is designed to help you with your data analysis, for example, by speeding up editing of the number of trips in the OD matrix when the total number of trips covers several centroids; or by analysing simulation output data over grouped object [...]

segunda-feira, 24 outubro, 2016|Categorias: Aimsun, Notas Técnicas Aimsun|

DTA: Agilize a convergência do DUE

Nota Técnica #18 Setembro 2016 By Josep Perarnau In large networks it’s important to minimise the number of iterations that the DUE needs to reach the relative gap. A low number of iterations dramatically decreases the total computation time to run a DUE. A good strategy for improving convergence is to start the DUE with an initial set of paths. A set of initial paths can come from using a path assignment file from a static assignment: run a static assignment and store the assignment to a paths assignment file. You then have two options: store [...]

segunda-feira, 24 outubro, 2016|Categorias: Aimsun, Notas Técnicas Aimsun|

Python: Função que gera Atributo

Nota Técnica #17 August 2016 By Grant MacKinnon Most users are familiar with creating their own attributes within objects within an Aimsun model. These will typically be numbers or strings but it is also possible to add a column to an object where a value is returned based on some Python Code, allowing a value to be calculated on the fly. A simple example is one that places a label letter on a turn to say whether it is Left, Through, Right or U-Turn. Click to enlarge: Showing the attribute in the network  Firstly we could create this colu [...]

segunda-feira, 24 outubro, 2016|Categorias: Aimsun, Notas Técnicas Aimsun|

Visualizando tráfego urbano, regional e de atravessamento no Aimsun usando a Ferramenta de Análise de Link e Modos de Exibição

Nota Técnica #16 July 2016 By Martijn Breen In transportation planning, traffic on the road is commonly divided into: Urban (internal-internal) Regional (internal-external, external-internal) Through (external-external) Note that here ‘internal’ refers to zones inside the study area, whereas external refers to zones outside the study area. These three types of traffic can be easily calculated and visualized in Aimsun using the Select Link Analysis Tool and View Modes. First you have to define the internal and external areas. Generate a new gro [...]

segunda-feira, 24 outubro, 2016|Categorias: Aimsun, Notas Técnicas Aimsun|

Utilizando Ferramentas de Revisão para Trabalhar em Equipe

Nota Técnica #15 June 2016 By Dimitris Triantafyllos When dealing with large networks, particularly when working to tight deadlines or on complex projects, it can be useful to have several people working on the same model at the same time. In Aimsun, the Revisions tool makes collaboration faster and means the whole team can work in a single file, which reduces errors and duplication of effort. Here’s a quick guide to getting the most out of Revisions: Prepare the network The network should have as many areas as revisions (and modelers in the t [...]

segunda-feira, 24 outubro, 2016|Categorias: Aimsun, Notas Técnicas Aimsun|

Componentes de Função Macro no Aimsun

Nota Técnica #14 Março 2016 By Margarida Delgado Imagine your cost functions have several components, such as distance, travel time or tolls. If you want to evaluate them all individually and show them as an output (in addition to the total cost) you can declare as many Macro Function Components as you need in order to produce each one of the extra Outputs when executing an Assignment. You can create new Macro Function Components in the same folder as Cost Functions. Click to enlargeThere are two types of Components: non-derived and derived. N [...]

segunda-feira, 24 outubro, 2016|Categorias: Aimsun, Notas Técnicas Aimsun|

Configurações de Geometria Parte 4 – Gerenciando nós e usando nós existentes

Configurações de Geometria Parte 4 – Gerenciando nós e usando nós existentes Nota Técnica #13 Fevereiro 2016 By Andreu Tarrida Managing Nodes Case A The new geometry uses some or all of the turns in the base geometry. After selecting the Nonexistent Here and Existent Only Here objects, you’ll see part of the original node. Double-click on the node to access the editor and then create the new turns between base sections and new sections, and also between new sections. When using the Connection tool, do not create a turn between two new sections [...]

terça-feira, 2 Fevereiro, 2016|Categorias: Aimsun, Notas Técnicas Aimsun|

Configurações de Geometria Parte 3 – Plano de Controle-Semáforos

Configurações de Geometria Parte 3 – Plano de Controle-Semáforos Nota Técnica #12 Janeiro 2016By Andreu Tarrida Imagine you have some new turns to analyse. The first step is to add them either to the existing signal groups or to new groups. Example: The through turn associated with Signal 1 in the base geometry is not the same through turn as the one in the new geometry, so it will not appear in the new geometry configuration view. No Signal 2 turns exist in the new geometry, so they will not appear in the new geometry configuration view. Add t [...]

sexta-feira, 22 Janeiro, 2016|Categorias: Aimsun, Notas Técnicas Aimsun|

Configurações de Geometria Parte 2 – Duplicando Linhas de Transporte Público e Planos de Transporte Público

Geometry Configurations Part 2 – Duplicating Public Transport Lines and Public Transport Plans Technical Note #11 January 2016 By Andreu Tarrida Duplicating Public Transport Lines and Public Transport Plans Public Transport Lines use the scenario’s network, which can be defined by a set of geometry configurations. This being so, you need to duplicate any public transport Lines that are interrupted by any of these geometry configurations and then redefine their route in accordance with the new network. You’ll also need to update Public Transport [...]

sexta-feira, 22 Janeiro, 2016|Categorias: Aimsun, Notas Técnicas Aimsun|

Configurações de Geometria Parte 1

Porque utilizar Configurações de Geometria? Com este novo recurso, você pode modelar redes alternativas dentro do projeto que contém o cenário base. In the geometry configuration object dialog, list the objects that do not exist in the new geometry configuration (“Nonexistent Here” tab) and those that only exist in it (Existent Only Here tab). The rest of objects, which are not included in any of these lists, are common objects between the base and the new geometry. The junction between geometries Nodes and turns are the junction between the ba [...]

quarta-feira, 16 dezembro, 2015|Categorias: Aimsun, Notas Técnicas Aimsun|

Exportando dados coletados usando API Aimsun micro

An essential step toward solving traffic congestion is the deployment of more accurate and reliable traffic monitoring systems. Traditionally, traffic monitoring systems are mostly limited to highways and rely soley on data feeds from sensors installed in the infrastructure, such as loop detectors, radars or cameras. However, this is not really sufficient, particularly on arterials. Probe-vehicle data are the only significant data source available today that have the potential for global coverage in the future; sources include smartphones, fle [...]

quarta-feira, 1 julho, 2015|Categorias: Aimsun, Notas Técnicas Aimsun|

Usando tempos de viagem de ônibus de uma simulação dinâmica em uma função de atraso de transporte público para alocação de transporte público

Imagine that you have run a dynamic simulation (meso, micro or hybrid) that gives you accurate travel times for transit vehicles that take into account congestion, reserved lanes, signals and transit priority algorithms. Wouldn’t it be nice to use this information to get a more accurate estimation of the stop-to-stop travel time in a macroscopic transit assignment? Thanks to the integrated modelling environment provided by Aimsun, this is possible. You just have to write a Public Transport Delay function that reads bus travel time from the tim [...]

sexta-feira, 16 Janeiro, 2015|Categorias: Aimsun, Notas Técnicas Aimsun|

Modelando Pedestres Legion com Interseções Semaforizadas

Aimsun allows 3 kinds of pedestrian-vehicle interaction: At uncontrolled intersections At fixed controlled intersections At actuated controlled intersections This technical note focuses on how to edit controlled intersections, where the basic infrastructure consists of pedestrian crossings, signal groups and pedestrian routes. Here we go…… You can position pedestrian crossings either at the beginning or at the end of any section. The image below shows how you can use two consecutive pedestrian crossings to model a regular crossing. Two consecu [...]

terça-feira, 16 dezembro, 2014|Categorias: Aimsun, Notas Técnicas Aimsun|