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Simulation: En-ROADS “Energy – Rapid Overview and Decision-Support”) Under Review

May 13, 2013, 11:44 pm
Source: Climate Interactive
Content Cover Image


Runs in less than 0.1 second.

En-ROADS is a fast, powerful simulation tool for understanding how we can achieve our energy transition, poverty, and climate goals through changes in our energy use, consumption, and policies.

The simulation is presently entering an external review. It can be viewed by contacting Climate Interactive. It is also being customized to address other questions and other regional scales.


En-ROADS is customized to address questions such as:

  • How much might technological breakthroughs contribute to addressing climate change? Breakthroughs could include:
  • R&D and scale-up of a new zero-carbon energy supply
  • Renewable energy
  • Energy efficiency
  • Inexpensive natural gas
  • What would we have to assume—about the technology, the economy, and the world—for a breakthrough to grow with enough speed and scale to deliver climate goals?


Full description and orginal resource page.

An extension of the C-ROADS simulation, En-ROADS focuses on how changes in global GDP, energy efficiency, R&D results, carbon price, fuel mix, and other factors will change carbon emissions, energy access, and temperature.

Like C-ROADS, this simulation runs in less than 0.1 second on a laptop, is transparent in its mathematical logic, and allows for testing of hundreds of factors, making it ideal for decision-makers in government, business, NGOs, and civil society.


Thus, En-ROADS is designed to complement, not supplant the other more disaggregated models addressing these questions, for example, those in the EMF-22 suite. Indeed, En-ROADS relies on the other models and EIA projections for testing and data.


Assessment is at the discretion of the educator and how this simulation is utilized for teaching.


Resources provided with En-ROADS:

Additonal Simulations by Climate Interactive >>


En-ROADS wasvcreated by Climate Interactive, Ventana Systems, the ClimateWorks Foundation Research Team, and John Sterman of MIT Sloan.

The simulation is built using the System Dynamics method, drawing upon the PhD theses of Dr. John Sterman and Dr. Tom Fiddaman, and thus emphasizes the dynamics of the transition to clean energy. That is, how long will it take for actions, investments, and policies to take effect and reduce emissions? When will action be necessary and in what order? The model emphasizes the system-wide interactions of policies. That is, how does energy efficiency affect renewable energy? What feedback loops, such as the learning curve, are important?

The ClimateWorks Foundation originally commissioned (and co-designed) the simulation to help chart a path to climate success. Behind the simulation 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.

caption En-ROADS stocks and flows One of the most innovative parts of En-ROADS is its capacity to test assumptions about the potential success of R&D towards zero-carbon energy. The simulation asks: What are the likely dynamics of the emergence of a new energy supply? How fast could it grow and displace high-carbon sources and, thus, reduce carbon emissions? A diagram of some of the structure is shown to the right.

For those familiar with C-ROADS, here is the distinction between the two: C-ROADS focuses on how the changes in national and regional emissions could affect GHG emissions and climate outcomes. En-ROADS is a global model that focuses on how changes in the energy, economic, and public policy systems could affect GHG emissions and climate outcomes.

The simulation is presently entering an external review. It can be viewed by contacting Climate Interactive. It is also being customized to address other questions and other regional scales.



Brown, G. (2013). Simulation: En-ROADS “Energy – Rapid Overview and Decision-Support”) Under Review. Retrieved from