> [...] eventually you will encounter step-wise jumps in travel time where you get through a yellow but the person right behind you has to stop. Keep in mind t

> [...] eventually you will encounter step-wise jumps in travel time where you get through a yellow but the person right behind you has to stop. Keep in mind that driving manuals are deliberately written at a 6th to 9th grade reading level depending on the state. Yes, you're right that the gains from speeding are marginal compared to the risk, cost, and stress. But it's hard to communicate that kind of nuance. If the manual just says lead-foots aren't going to get somewhere faster by speeding to each intersection that's "good enough" and very close to reality for the purpose of the manual. National merit semifinalists can get the queue-theory version from their high-school math/driving instructor during driver's ed.