Most CS degrees have students do a "traffic light" exercise at some point: build an model of an intersection, run the stoplights.
Those lessons sometimes ask questions like "Are there pedestrians in your model? Maybe bikes? How about buses? Exactly who lives in the neighbourhood, do they relies on public transit? Et cetera.
A question I like to ask students, that always gets a lot of uncomfortable silence is: at what point do these decisions stop being software, and start being public policy?
