How to signal a basic 4-way intersection

I completed the game after a first playthrough which took 137hrs. I didn't go quickly by any means, a lot of this was exploring the world and just learning the game and walking around and marveling at it. I was blown away by this game, even after playing 200+hours of Factorio. Although it's probably still fair to give Factorio the #1 spot in the genre, as it's the OG and such a classic now, I feel like this ties with it. I remember getting past the 20hr mark and just realizing how beautifully designed everything is and how huge the scale of it is, the size of the world, I just wanted to play all day. I will continue on this save file and start building up some of the more aesthetic factories that I see people making on youtube and reddit. At this point just wondering if a lot of people look for others to play the game with, and secondarily whether there's much interest in watching streams of this game on YT or twitch, as it's something I'm wondering about getting back into.

So orange

This was my first Nuclear power plant. It does the complete cycle through to burning Ficsonium. I started to scale it up but haven't finished.