See attachment for example where opposite hard shoulder endings are needed. Because there they don't turn automatically.
If the UK endings (arrow) are enabled you can pick the UK version which is already turned.
A parameter to select set is also ok. Eg a selector with: Autodetect, Righthand drive, Left handdrive, Both.
Got some (I think cool) addition ideas too.
A center barrier with light pole. As 3rd and 4th rotation of the current center barrier.
A 3rd lane for one direction on a own tile (without barrier). (so it's possible to make a two wide center without barrier between the highway directions (Rural highways

))
An Eyecandy Fuel Station. (for example 2 tiles long and 1 wide, comes instead of a piece of shoulder)
A U shaped piece of shoulder and Parallel | | would also come handy, for example at exits you sometimes need them.
<see second screen for u shaped example, the barrier ending to the Other highway doesn't look good either because, there is a part hard shoulder missing then and gras is showing through a little gap>
Gr. Jordi