Path Follow plugin

I’m a noob to UE4 but this seems like the perfect tool for the project I want to make. I’m not sure how to do what I’m trying to do and was hoping someone could explain the general concepts to me. I kind of understand blueprints but am not totally sure which blueprints to use for each goal. I can use the tool to make a path, set speed and event points, and attach a follower to the path, which all works great; but, here’s what I want to do:

  1. I want to have paths along roads in a town, which will spawn random actors from an array, travel along, and destruct on exit or loop back to the beginning.
  2. I want to spawn random collision boxes, speed points, or event points along the spline that will make the vehicles swerve a little, slow down, speed up, and behave erratically.
  3. I want to create traffic lights that will stop/start traffic.
  4. I want the cars to simulate physics in order to have crashes with the player but not major accidents with other traffic vehicles.

I tried to create an abstract actor, which would randomly spawn child actors to get different vehicles; but, I have been unsuccessful at having the spawning actor or child actors to move along the path. The spawning on can attach to the path but I can’t get anything to move.

I really appreciate any help, either help to conceptualize how to do this or detailed help on parts of it.

Thank you in advance