I know but u cant deform the landscape with the blueprint splines like u can with the landscape splines.
So again, should I build the road out of landscape splines and the overlay on it the blueprint splines to show the AI where to go?
Your question is complex and you can go about it in many different ways. I’ve been thinking about creating a traffic system as a future project and thought about 2 main approaches - Node Based (AI goes from node to node) and spline-based (AI follows a spline). I decided to go with splines for more control since the AI will be driving a car.
As far as creating roads - feel free to use my free community tool the Modular Road Tool to create your roads quickly :).