Sounds like you have a very good system in place. I doubt there would really be a use case for using keybinds for drawing, since a perfectly straight line could theoretically only improve a hand-drawn line by either 1 or 2 units of concrete, working out to 20 or 40 tons, which is tiny. For most roads I doubt it would change it at all since I don't think it would change it enough to take it over the threshold for a unit of savings.

I use a vertical mouse and a good mouse pad. It's easier to draw steady lines when I move my entire arm. I have a regular small mouse that I use outside of home, but I can't really draw anything good with it.

I've read that it's possible to use keys to emulate mouse movement. Never tried that, since new levels are mostly curves, not lines.

Just got 784 by removing the bridges in the middle, which I'll post in a screenshot. I'm afraid I don't have the time right now to optimise it further, but the concept is simple so I'm sure you and Satse could have a good go.

Wow, really good work here. I'll see if I can beat this score, but overall the level seems to be pretty much done now. One thing I've noticed for a while now in your drawings is that your lines are incredibly straight. Do you just have a very steady hand or do you use a trick? I have seen some people post from years ago about making straight lines with some shortcut keys.

Either way the drawing here is very good indeed, the only way i can see improving it would be some small bridges and maybe a few more points for some of the connections.

Sorry, I messed up in my explanation,

I meant that apart from orange line going North (copied from you), I had an extra line going South next to it. And then I moved both of them to the center.

For a while, I used a version of your layout with extra lane going from Possum Hwy to 7 NU. Since April 14th, to be exact.

I took me some time staring at running cars to finally realize that this lane has to be moved to the center, and horizontal lanes are not needed at all.

So, in a way, the only thing that was always there no matter what, is a roundabout itself.

Yeah, i was just thinking that if that is not counted new layout, my version would not be new layout either.

Any way, well done! Your flowanalyzing is probably the best in this game

Hmm, I bet this is a new layout if you count all the differences.

This one was made not by tweaking the existing solution but by flow analysis.

I wonder how far Strawberry can improve it, being insanely good in squeezing the last possible efficiency point.

Nice. You and strawberry immediately improved my layout. And even further than Strawberry. Incredible work!