public class CameraRailMovement : MonoBehaviour
{
    public double LookAHead;
    public double LookTime;
    public float Speed;

    void Start()
    {
        iTween.MoveTo(gameObject,
            iTween.Hash(
                "path", iTweenPath.GetPath("MainCameraWaypoints"),
                "easetype", iTween.EaseType.linear,
                "time", Speed,
                "orientToPath", true,
                "lookahead", LookAHead,
                "looktime", LookTime)
            );
    }
}