This is why it's so important for governments to move towards open source solutions as much as possible despite the "high-cost of switching and training" and whatnot. Technology is going to be ingrained so much more in our institutions in the future. And it's going to be way more expensive to solve issues if there is proprietary products lock-in.

My personal view is that to see the cities of our near future, go to practically any big city in Asia today. High population density, everybody (whole families and and their farm animals) racing about on small motor scooters. Not a bad standard of living, but nothing like what we in thew west are used to (I'm in Australia).

Segways and flying cars are too expensive to make, too hard to fix, and too expensive to run. Ditto for maglev trains running in vacuum tunnels under cities.

In some scenarios it makes sense to have both lights and roundabouts, in extreme cases it even makes sense to fit roundabouts on a circle of roundabouts which then have lights at peak times.

NYC is currently learning that lesson all over again (or more likely failing to learn it) with the long overdue and long-dragged-out upgrade of our subway's 80 year old signaling systems. (Not to mention the hundred year old water tunnels that we can't afford to take out of service for repairs.)

Also a trampoline room.

It probably ran on Windows 3.1 and they lost the install disks.