In the UK we have a sign saying something like "20MPH WHEN LIGHTS ARE FLASHING". During term time when pupils are entering or leaving the school (say between 8a

In the UK we have a sign saying something like "20MPH WHEN LIGHTS ARE FLASHING". During term time when pupils are entering or leaving the school (say between 8am and 9:30am, around lunchtime, and from around 3pm to 4:30pm) someone at the school switches the lights on. Usually it's one of the "lollipop men" who stand at crossing points that are not otherwise marked, and hold out a sign to stop traffic to let children cross, but often it's just programmed into some timer somewhere. It's pretty simple. You don't need clever software or self-driving cars, you just need to lift your right foot a little near schools. https://maps.app.goo.gl/34QgN2KTQmGML2Ae8 https://maps.app.goo.gl/34QgN2KTQmGML2Ae8 Here is an example of one that just lights up with a 20mph limit when it's needed, from near where I grew up. Pretty high-tech for a remote part of the world, eh?