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En-ROADS

Climate Change Solutions Simulator

En-ROADS is a transparent, freely-available policy simulation model that provides policymakers, educators, businesses, the media, and the public with the ability to explore, for themselves, the likely consequences of energy, economic growth, land use, and other policies and uncertainties, with the goal of improving their understanding. The simulation, developed by Climate Interactive, Ventana Systems, and MIT Sloan, runs on an ordinary laptop in a fraction of a second, is available online, offers an intuitive interface, has been carefully grounded in the best available science, and has been calibrated against a wide range of existing integrated assessment, climate and energy models.

A wide range of people have used En-ROADS, including members of the U.S. Congress, HSBC bank, the Hewlett Foundation, local community groups, the UN Secretary-General’s Office, university professors around the world, leading science educator Bill Nye, and many others.

En-ROADS is best used as part of one of our two facilitated group learning experiences: the En-ROADS Climate Workshop and the Climate Action Simulation.

All are welcome and encouraged to join our free online trainings to learn more about the science behind the simulator and event facilitation.

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Go to the En-ROADS simulator

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Check out The En-ROADS Training Plan

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Watch a three minute demonstration of its operation and features below.

Ways to Use En-ROADS

By yourself

Create a scenario and share it

Experiment with the simulator and create your climate vision in En-ROADS.

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Create a scenario and share it

In a workshop

The En-ROADS Climate Workshop

A non-role-playing workshop experience for groups to learn about climate solutions.

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The En-ROADS Climate Workshop

In a game

Climate Action Simulation

A highly interactive, role-playing game using En-ROADS in a model-UN-like summit.

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Climate Action Simulation

Looking for a take-home activity for your students? Be sure to explore the En-ROADS student assignment.

Have you run an En-ROADS Event? Please register your event here. Registering your event allows us to keep track of who is running the game around the world.

Register your En-ROADS Event

En-ROADS RESOURCES

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Read The En-ROADS User Guide

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Explore Videos on En-ROADS

  • The En-ROADS Simulator
    The simulator itself!
  • One-page Guide to the Control Panel
    A basic overview to the main sliders in En-ROADS.
  • The En-ROADS Training Plan
    Join our interactive training plan if you are interested in learning how to facilitate the workshop and/or game.
  • The En-ROADS User Guide 
    Descriptions and explanations of the model dynamics and insights, along with FAQs.
  • The En-ROADS Climate Workshop
    With a group, use En-ROADS to explore the impacts of climate solutions in real-time.
  • En-ROADS Student Assignment
    Resources to help educators use En-ROADS successfully in their classroom.
  • The Climate Action Simulation
    Lead an engaging role-playing game using En-ROADS where participants are oil executives, activists, heads of state, and others.
  • The En-ROADS Reference Guide
    Documentation of the model structure and assumptions behind En-ROADS.
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Ways to Share En-ROADS

En-ROADS games and workshops have been delivered around the world. Here’s how you can get involved:

Facilitator

Become a Facilitator

Find Facilitator

Find a Facilitator

Nominate

Nominate someone
to be a Facilitator

Simulator Science

En-ROADS is a System Dynamics model with origins in the MIT PhD theses of Dr. John Sterman and Dr. Tom Fiddaman. Recent breakthroughs have enabled the model to be made user friendly and accessible to wide audiences. The modeling team at Climate Interactive, led by Dr. Lori Siegel, have taken on the more recent model developments in continued collaboration with MIT Sloan’s John Sterman, Ventana System’s Tom Fiddaman, and many others.

En-ROADS is a global model that focuses on how changes in the energy, economic, and public policy systems could affect greenhouse gas emissions and climate outcomes. Behind the simulator is an extensive study of the literature of important factors such as delay times, progress ratios, price sensitivities, historic growth of energy sources, and energy efficiency potential. En-ROADS stands for Energy Rapid Overview and Decision-Support.

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En-ROADS is a high-order, non-linear differential equation model built originally and contemporaneously in Vensim software. We then translated En-ROADS into WebAssembly via a tool we built with Todd Fincannon called SDEverywhere so that it can run in a web browser. When a user moves a slider, the En-ROADS application calculates the results from ~14,000 equations, with a time step of ~45 days, over 110 years from 1990 to 2100, in 60 milliseconds. 

If you like En-ROADS, you may appreciate exploring the larger, more disaggregated models that our modeling team used to test and calibrate our simulator. One group of models is the Energy Modeling Forum out of Stanford University, which includes 18 energy-economy and integrated assessment models. 

All assumptions, equations, and parameters are documented in the En-ROADS Reference Guide (380 pages).

A brief overview of the insights from academic literature supporting the need for En-ROADS is here.

Below, you can see the main En-ROADS interface.

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En-ROADS in the Media

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How to get to a Zero Carbon Future Using En-ROADS

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Review of En-ROADS by Amy Harder of Axios

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Design the perfect Plan to End the Climate Crisis with En-ROADS

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Quotes on En-ROADS

En-ROADS teaches us that while it is still possible to avoid dangerous climate change, there are indeed no silver bullets to reach this goal, and we have our work cut out for us.

Eileen Claussen, President, Center for Climate and Energy Solutions (C2ES)

En-ROADS is useful as a way to influence government, business, and public opinion to think, “Yes, it is possible to keep greenhouse gas concentrations below 450 ppm and temperature increase below two degrees.”

Alfredo Sirkis, Brazilian Congressman

I think we all walked away with a better understanding of the complex energy and climate system and hope in our collective ability to drive a more sustainable future.

Jessica Thomas, Director, Business Sustainability Collaborative

From a personal perspective, I found the session very useful and the capability of the model, its speed and ease of use are definitely beneficial to get the key interdependencies and challenges seen in real time and so help to stimulate discussion and debate within a group.

Gareth Davies, Pöyry Energy Consulting

Until your course this week, I’d pretty much put the environment out of mind. But with your system dynamics model, I feel that I understand the levers in a deeper way and more structured so that I could explain it to others.

Bruce Pon, Management Consultant and MIT Business Dynamics student

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Engaging With En Roads
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