Signal controllers learn whether a jam is a burst or a cut road: waiting-time recovery falls from 329 to 245 seconds under random blockages
Network signal control no longer compresses the whole road network into one shared latent vector. Policies trained under nominal flow often cannot tell a brief fluctuation from a sustained capacity loss when blockages, corridor failures or rain arrive. Here each intersection re-weights its neighbours from their joint state, then reads a history window to judge whether a change persists, cutting waiting-time recovery from 329 to 245 seconds under random blockages and by 82 seconds under a central closure.