Let us make a multiple trails in one trail.
For example:
Roadsign - 1 maximum trail
Milestone - 4 maximum trail (max 2 trails in one)
Add some more variants if need.
For example a random situation:
I have milestone from my home to the mountain, it is 50 minimaps long, called "Mountain"
In the middle of this trail there are big swamp, im too lazy for making a second trail of 25 minimaps.
So i can go to this place, and click on my trail "make Fork" and name it "Swamp". After that i will be able to build next milestones were i need.
So i will have 2 options in my main milestone: "Swamp" and "Mountain", half of a way will be used one trail for both.