Holy cow! That's pretty cool looking, but I'm way too non-electrical minded for that kind of undertaking.
If you're doing it because you like electronics, that's an awesome project since basically everybody with an Insight would like their car to autostop at higher speeds.
But if you're just looking for the easiest way to make it happen, I had Daox make me a custom shift knob with a kill switch, regen button and clutch override switch for my Insights. I think it does exactly what you're looking for without a bunch of work or cost. I had maybe fifty bucks in the kill switch, regen button, clutch override and custom 3D printed shift knob altogether
I can kill the engine at any speed, autostart at any speed, keep it from background charging on the highway, and get full regen using only engine braking at the touch of a button.
Well, I could when my IMA was functioning
It still works on my first Insight which my son owns now.
Here's the link to my first install on Turtle:
http://ecomodder.com/forum/showthrea...tml#post467947