•Car-drivers: traffic signals do always display red when I arrive there

•To remedy this, traffic signal co-ordination is attempted

•Most famous: the green wave

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•Easy to understood: in a space-time diagram, a platoon of vehicles progresses from one traffic light to the next

•Unfortunately easy to understood: one may think that doing the same in networks is simple, too.

•Not true, of course

> Traffic signal co-ordination > Alms et al • coordination.pptx > 15 May 2019

DLR.de • Chart 2

https://www.fhwa.dot.gov/publications/publicroads/02janfeb/timing.cfm

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