Emme Transit Assignment Of Benefits

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Emme is a complete travel demand modelling system for urban, regional and national transportation forecasting. Emme is used in over half the world's most populous cities and runs some of the world's most complex transportation forecasting models.

The most advanced modellers in the industry have relied on Emme's flexible, open modelling approach to easily leverage established techniques or to adapt and innovate to new model applications with unrivaled flexibility.

Emme offers a transport modeling application framework for leading computational performance and unmatched technical rigor, and makes assembling model workflows fun and efficient. Emme promotes true model transparency, and offers seamless transition between easy interactive use and sophisticated scripting.

Learn what's new in Emme 4.3

Make your city a model city, whatever the planning application

What can you do with Emme? Here are some common applications:

Travel demand forecasting. Implement virtually any zonal-aggregate travel demand model with any feedback structure, trip generation and distribution choice models. Apply trip chaining, capture multimodal accessibility and power leading activity-based and land-use models.

Transit planning. Evaluate changes to transit routes, frequency, quality of service, transit service competition or fare integration, crowding on transit vehicles and at stations, walkability/accessibility, park-and-ride, kiss-and-ride, and transit system design.

Traffic planning. Evaluate road network expansion and management schemes, toll schemes and toll revenue forecasts, accessibility studies, junction delay, traffic demand management, critical infrastructure, freight and good movements, and bicycle traffic.

Economic, emissions and environmental analyses. Analyze vehicle cold starts, operating conditions, and other key data for emissions. Evaluate transit service quality by demographics, compare demand management techniques, perform investment-grade infrastructure and toll evaluation or forecast benefits to support cost/benefit or other project-ranking schemes.

Transportation data science.  New data sets in transportation are changing the way we develop models, interpret results and evaluate alternatives. From activity-based and other predictive models, mobility analyses or data wrangling, Emme includes some of the best data tools available and a unique environment for integrated transport modelling and Python data science.

Emme has everything you need for world-class transportation forecasting

Key benefits of Emme 4

A better way to model

A true component-based application framework for travel demand modelling and transportation forecasting. Rapidly build and deploy complete models. Refreshing new user interfaces provide excellent usability, and transition to modern Python scripting for maximum productivity.

Smart analysis and great visuals

The quickest, most complete scenario comparisons. Compare anything, including network topologies and values, matrices or charts. Over 100 maps, charts and tables. Rich GIS Basemaps from included online services, or any existing ArcGIS raster, vector or server content.

Tech support

The industry’s best software support services—plain and simple. Talk to our users and see. Unlimited telephone hotline and email contact included.

Credibility and trust

The world’s most trusted algorithms and procedures, designed to work rigorously and on large models. Emme powers some of the world’s most complex transport models. Published, peer reviewed and highly regarded procedures tempered by hands-on application and modern computing.


Uncompromised access to network topologies, delay functions, transit services and access connectors means there is nothing to get between the analyst and clear interpretations of model details. Full network editing on native model representations.


Think outside the box with model procedures that are always easy to adapt to local needs. Avoid lock-in with data that can be easily exported to open formats. Play nice with Windows or Linux OS, and share licences on local networks with floating licencing.

Updating to Emme 4?

Moving to Emme 4 couldn't be easier. Whether you are updating from Emme 3, or from an older version of EMME/2, your database, worksheets, models and macros will all work. You won't need to port your model, and you can continue working like before. And when you are ready to explore new features, take a look at our highly-regarded training courses.

New to Emme?

Emme has never been easier to use, or as powerful. Learn more about all the improvements to the Emme Desktop, the Emme Prompt and the Emme Database, or read how Emme Modeller, the Emme Logbook and the Emme APIs provide a better way to model.


Map, edit and compare planning scenarios

Make informed planning decisions with dynamic maps, charts and reports that are always up-to-date. At-a-glance scenario comparisons and network differences help to make data clear and actionable. Spatial and relational data capabilities provide new workflow possibilities.

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Easily prepare and run models

Build, deploy, maintain and run transportation forecasting models better than ever with groundbreaking usability, model clarity, reuse and automation. The acclaimed flexibility and performance of Emme in a refreshing user interface and an amazing component-based system.

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Modelling Matters

Leading traffic and transit assignments, unmatched traffic and transit path analysis, the best demand adjustment framework, the only mathematically rigorous congested transit assignment procedures, powerful network and matrix calculators and much more. Modelling matters, and the difference is always in the details.

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Never get lost in a model again

Bring clarity to even the most elaborate model systems. Explore model structure, not just network structure, in stunning hierarchical detail that unfolds while models run. Then review, revise and re-run any step for iterative model development.

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Interested in trying Emme for yourself?

Start your 30 day free trial today and see why thousands of transport planners around the world choose INRO software.

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New in Emme 4.1

Emme 4.1 introduces many new modelling and desktop features which help make Emme faster, easier to use and more powerful than ever before. Some highlights:

Emme 64-bit native version

Emme is now available in both a 32-bit and a 64-bit native versions. The 32-bit version runs on both 32-bit and 64-bit operating systems. The 64-bit native version will allow more RAM per user process for more memory-intensive applications. Emme Desktop, Emme Modeller and APIs and the Emme Prompt can all benefit from larger addressable memory when using the new Emme 64-bit version.

New multithreaded second-order (SOLA) traffic assignment

The SOLA traffic assignment is an extremely efficient implementation of a variant of the linear approximation method for faster-convergence to a finer solution. Multithreading provides substantial performance benefits on multiprocessor systems. Relative gaps of the order of 10−5 to 10−6 for single and multiclass equilibrium assignments may be obtained in practice.

The SOLA traffic assignment tool provides full support for Emme path analysis, cutoff analysis and traversal analysis capabilities. And despite being a second-order procedure, SOLA traffic assignment has the benefit of not requiring any changes or modifications to existing volume-delay or turn-penalty functions. It can, therefore, be used as a direct upgrade/replacement for any applications already using the Standard traffic assignment tool. Results obtained with the SOLA traffic assignment exhibit proportionality (when well-converged), such that select-link results, link class flow results and other non-unique results will receive proportional O-D contributions. Read more.

New traffic assignment with toll modelling features (PToll)

The new PToll traffic assignment tool adds tolling features to the faster-converging SOLA traffic assignment, including distance-based toll capping and explicit support for ramp-to-ramp tolls.

Web basemaps

The new Web basemap layer provides georeferenced display of basemaps from online map services with worldwide coverage, including ArcGIS Online and OpenStreetMap, in a new, responsive layer that provides quick view navigation and asynchronous download of tiles.

The ArcGIS basemap layer makes it possible to view ESRI ArcMap®-supported data and documents alongside Emme map layers. The ArcGIS basemap layer requires separate installation of the ArcGIS Basemap Add-on, which is now included with Emme where permitted.

Multithreaded transit assignment and new crowding features

The Extended transit assignment tool is now multithreaded, providing even faster performance and speedups on computing systems with multiple processors. The speedup is particularly significant for iterative crowded transit procedures, which has been applied in some of the world's largest cities. All transit analysis tools, including Matrix results, Network results, Strategy-based results and Path-based results are now consistent with iterative crowding procedures. And it is also possible to customize crowding delay functions with Python snippets for complete model customization.

Transit logit flow distribution

A new option permits the use of logit functions to distribute flow at regular nodes with auxiliary transit choices, and to use a logit distribution to split travellers between alighting and staying on board. The result is much smoother response to service differences, even for small changes. 

New transit analysis apps

A number of new transit analysis tools make popular transit analyses available out-of-the-box. The Transfers at stops tool analyzes line-to-line transfers between all lines at a stop or a group of stops. The Station-to-station analysis tool computes a station-to-station ridership matrix between the first boarding on transit line(s) A to last alighting on line(s) B. The Line-to-line transfers tool analyzes transfers for trips alighting line A and boarding line B. The Line-to-line trips tool analyzes trips boarding line A and alighting line B. And the Stop-to-stop trips tool produces a series of reports detailing the distance, time, boarding, alighting and volume along a stop sequence of a transit line and an optional reverse itinerary.

Network find

The new Find tool makes it easy to identify network elements on a map. Nodes, links, turns, transit lines and segments located within the find tool circle are listed in the Network find window. Or query with any network expression to filter elements. The network find window displays attributes and values, and highlights the network element on the map or provides visual cues if off screen. Keep a list of selected network elements to help in your workflow, and quickly navigate to them in the network editor or other worksheets. 

Transparent worksheet styles

Emme 4.1 introduces transparency for worksheet layers. A new Opacity property is available for the fill, pen and text patterns in the Style Properties window.

New and improved legends

Easily add a legend corresponding to any layer in a worksheet with the new Insert legend button in the worksheet toolbar. Choose from the previews of legends then position the legend by dragging it on the map. Changes to layer controls are updated in the legends automatically.

Use explicit intervals or automatically compute breaks to classify styles from data values. Add labels to each style index for display in legends. Save and re-use style legends in other layers and worksheets.

Better transit line editing

Emme 4.1 introduces improved transit line editing tools in the Network Editor. Creating and modifying transit lines is quicker and easier with smarter path-based editing. The display of the transit network is now transparent to more easily identify the underlying road network and greater opacity indicates overlapping transit lines.

OpenStreetMap and GTFS import

A new Import from OSM tool allows easy import of OpenStreetMap data for network creation including road hierarchies and transit and auxiliary transit links. Corresponding node and link attributes and turn restrictions are imported. And the Import from GTFS tool imports spatially detailed headway-based transit line itineraries from General Transit Feed Specification data.

IPython Notebook

The IPython Notebook, a browser-based visual computing environment that allows users to author documents including live code, narrative text, mathematical equations, images and HTML, is now included with Emme and easy to use out-of-the-box together with the Python Emme APIs. Great for model development, ad hoc scripting, sharing results with colleagues and tapping into the broader power of Python and SciPy.

Multiclass demand adjustment improvements

The Multiclass demand adjustment tool provides usability improvements and also works with the new SOLA and PToll traffic assignments. The user interface of the Multiclass demand adjustment tool is improved, making it easier to specify interactively, and to keep class-specific details in sync with traffic assignment specifications.

Print preview and save to PDF/SVG and image formats

Improved publishing options for maps and charts include a live print preview, saving as PDF and SVG vector formats, and saving as PNG, JPEG and BMP image formats.

Measure distance tool

The new Measure distance  tool in the Emme Desktop allows measuring the straight line distance between a series of two or more points on the network plane. The straight line distance can be either Euclidean or geodesic, depending on the selected units.

Network Expansion Add-on

Emme 4.1 introduces the Network Expansion Add-on to increase the maximum permitted network size beyond practical limits for all-streets networks, statewide or national models, etc.

Dynameq Add-on

With the Dynameq Add-on for Emme users can access Dynameq on the same computer as Emme, from an existing Emme licence, to provide access to industry-leading wide-area traffic simulation and dynamic traffic assignment (DTA). A great value, and a great way to get started with Dynameq applications. Emme and Dynameq also play better together than ever before with new Modeller tools for network and matrix data transfer. 


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