Imagine what would happen if someone could make lights green in 2 directions.

I didn't consider it because the solution is obvious. An interlock that makes it electrically impossible to have 2 greens, like an airlock has a piece of hardware that prevents both doors opening at the same time. I suppose I should also mention the obvious that if the internet connection goes down, or the camera lens gets iced up, etc., it should automatically revert to egg-timer mode.

See https://en.wikipedia.org/wiki/Therac-25

I can't find the report right now but upgrading all of the signals on 2nd from Denny to Yesler cost something like 30 million bucks.

Somehow the money is always found for internet connected cameras to spy on us.

The upgrade in the Mercer project area isn't exactly a glowing success:

These are solvable problems. Except point 11, which is ironically complaining about it working successfully at what it was supposed to do.