itch.io

just use standard 20m rail piece and put it inside both ot them.

you have to be precise, otherwise trains may jump up over parts that sticks out where they shouldnt and end up derailed.

there also is (i think it is in vanilla) a piece in fences that look like train track which you place just like..  fences. it have the same wide as those from mod but its really hard to put them as you would like to.. so use it only as a last resort.

Exactly like Jupiter said! I would suggest overlapping a straight piece or a curve piece with the piece on the right, but stick it out so that it connects. or use the placeable fence! It is ususally much easier to overlap track to make connections on straight pieces, so I also might suggest relaying track from the switch back the other way until you can get to a straight piece to line up. If that makes sense?