Afraid you are a long long way behind. If you check out the scenery design forums on Avsim you'll find that all kinds of dynamic scenery objects are being produced, from hangar doors that open when you approach them, to wig-wag lights that change colour when you get near, traffic barriers that open etc etc etc.

DODv3 was used for making trucks and other objects move around a scenery but it has now been superceded by Busy Objects.

But don't think that any of this is easy - it's not, it's very complicated.

BTW I recently downloaded an Airbus which when you land is 'approached' by all kinds of service vehicles - stairs, fuel truck etc. Trouble is they just 'appear' when you stop so although interesting, they strain credibility a bit.

LAGO has payware scenery that has to be programmed for each plane so that when you approach the gate, it swings out to the aircraft.

So lots is going on in this area.