In mass ai crowd movement using statetree, I want to create the conditions of stop and go

Your First 60 Minutes with Mass

I’ve read all of the above and tried to understand, and I’ve been searching for other information for days.

But nowhere, I couldn’t find any information about the MASS AI crowd just moving, accepting a tipping point for certain conditions placed at the level. I thought this could simply exchange the parameters’ events in the blueprint, like niagara, but I couldn’t get the Mass behavior StateTree in the blueprint

What I want to do is simple. I just want to add this crowd to the blue print of the traffic system I already made, and depending on the traffic lights, they just have to stop in certain areas, or move again. (like city sample. But the city sample is too huge)

How can I cast(or control) the parameters of ‘Mass behavior StateTree’ in the blue print?