How to make a GPS-Style path system

I have made a system in my driving game where you click one of the pre-defined locations on the map and a billboardGUI appears at the location so you can make your way there. But I would like to make a physical trail of arrows on the road to the location running in the road, like a Sat-Nav but on the road instead of on a map. I’m not sure where I’d get started with this. Any advice is appreciated.