Hi, Billund XP is not testet with World Traffic 3 and nothing special has been done to make the scenery compatible with WT3. There are taxi routes defined and parking spots are defined as "gates", but I am not sure if this is enough to make the scenery compatible wit WT3.
Thanks, John. Since taxi routes and parking spaces have been included with the airport, World Traffic 3 AI should work. Now, I feel comfortable enough to purchase. I'll test and provide my results here.