DigiGraph models a region's road network and the traffic on it, and answers planning questions fast: what happens if this bridge closes, which roads saturate as an evacuation order goes out, and how each new hurricane forecast changes the plan.
Each National Hurricane Center advisory becomes a set of evacuation scenarios, compared side by side and checked against how earlier forecasts verified.
Remove roads on the map, for construction staging or a bridge closure, and see where the traffic goes.
Every answer from the graph neural network surrogate is shown next to the exact traffic-assignment solution it approximates, with measured accuracy and compute time.