Spawn object and move along a path

Hello.

In my project a car spawns at road every 30 seconds. And i want them to follow the road(my path.)

My question is:

What is the easiest way to make objects follow a path; and how to make it?

Thanks.

I do car - road following using my code here - you want to use MoveOnPath so that you can get a variable speed I would imagine.