I notice that the vanilla game added the ability to place stop signs on road junctions. It can be found in the Traffic Routes menu under the Junctions tab.

Does this clash with the TM:PE ability to edit junctions? I seem to be able to set stop signs both ways, yet they appear to do different things. The built-in way adds a stop sign prop, whereas TM:PE does not.
If I set both (because I like TM:PE's greater control but also want to see the sign prop) then will that cause any issues? Should I prefer one over the other?

Toggling traffic lights also appears to be a built-in thing too, but TM:PE seems to work with this by setting the same thing (the same icon appears).