A new project aims to create a computer replica of an entire city. It will allow experts to perform real-time resilience testing to see how its infrastructure will perform in the face of challenges such as climate change and population growth.Known as the "digital twin", the technology has already been adopted by Formula One teams and engine makers like Rolls Royce, but its use to this degree didn't exist.A partnership between Newcastle University and Northumbrian Water will recreate Newcastle based on data from across the city and test its resilience in possible emergencies. Professor Chris Kilsby said, "You can try lots of things with the twin in the case of a city. I think of it as a replica that you can play with and do unimaginable things to see what would happen. The changes can be seen immediately- from observing what would happen if the river Tyne rises by a few meters to what the city would look like if the population has aged over a certain period of time. It could also be used to model human behavior, for example, determining the most likely roads people would use in the event of a flood."