the only problem with them being nav lights is that they are inverted on the inside. also, there are arrows on the green side that point along it being the way of trafic, so it looks like you are intended to go through the green side. the reason the ai and docking comps do it is becuase of lazy coding done by frontier, I feel like at some point they will fix it, but not soon.
The fact that they are are inverted means there is no "green side". There are arrows on BOTH sides and the ALL point in, none of them point out, and not all stations have them. The reason the AI goes thru the centre is coz that's where you are supposed to go. Anacondas, Pythons, and T9's HAVE to go thru the centre. At one point in the beta they even had gravity fields that would push you into the centre but they caused more problems than they fixed so they were scrapped. You can go through the archived beta forums and read all the complaints about them there.
If that were the case, the red lights would not be flashing.
Red and green nav lights are fixed. The only light that flashes is the white beacon light.
The fact that the red light is flashing is a pretty clear indication that the station is telling you not to fly on that side.
That really depends where.you are. Channel markers here flash. And traffic lights DON'T flash. And not all station lights flash anyway.
It's simple really. Green lights mean go, middle means NPC or docking computer, flashing red means avoid at all costs.
It's far more simple to think that spaceships that move more like planes or ships and don't have roads like cars would use navigation markers like planes or ships, and not traffic lights like cars.
I just don't understand why station architects didn't just build an entrance and an exit seperately? Entrance on one end, the exit on the other. This way they could save alot of money on mono-directional docking platforms... And there can still be scanning on both entrance and exit.. and anyone wanting to enter though the exit is gonna be extremely suspicious anyway.
In game reasons: entrances are weak points, entrances need special, expensive shields to keep the atmosphere inside, and the back of the docking area (where the central tower now is) which would have an exit has the rest of the space station behind it.
Real reason: because the original elite had these stations and they are staying true to their legacy as much as they can, and coz David Braben likes these stations and it's his baby.
FYI stations don't scan anyone, that's the police outside. That's why it's sometimes possible to get in without being scanned. The stations however will shoot you if the police report you as a criminal, or if you attack the station.