how use this waypoints to create a car AI?

Unity Engine
,
1 
#pragma strict
// ShowGoldenPath.cs
public class ShowGoldenPath extends MonoBehaviour {
    public var target: Transform;
    private var path: NavMeshPath;
    private var elapsed: float = 0.0f;
    function Start() {
        path = new NavMeshPath();
        elapsed = 0.0f;
    }
    function Update() {
        // Update the way to the goal every second.
        elapsed += Time.deltaTime;
        if (elapsed > 1.0f) {
            elapsed -= 1.0f;
            NavMesh.CalculatePath(transform.position, target.position, NavMesh.AllAreas, path);
        }
        for (var i: int = 0; i < path.corners.Length - 1; i++)
            Debug.DrawLine(path.corners[i], path.corners[i + 1], Color.red);
    }
}
2

Hello There!

how use this waypoints to create a car AI, because i have problems to create Transform[ ] and set steerings