I improved the dead ends for roads a bit.
Now the look more like actual dead ends.
There is also a variation of dead ends, turning circles.
You find a technical description as well as screenshots here:
https://github.com/CleverRaven/Cataclysm-DDA/pull/7003
Looks nice!
I liek. Good job Wuzzy.
Thank you.
It has been merged btw, so you will see it in next version or in experimental builds. 
Could we get rotaries aswell?
I can confirm that rotaries (roundabouts, traffic circles) have started to become common in the area, no objection there.
And then there are tons over by Cape Cod. Although they are actually removing, or have removed, two of them.