A highway sign in Trailer 2 names the airport, and two places nobody can explain
We pulled the frame at native resolution. VCI Airport, Southside, Peacock Bay, an interstate spur and a US route, all legible, none of them mentioned anywhere else.

Method: frame pulled from Rockstar's 2160p Trailer 2 master, cropped at native resolution.
Grand Theft Auto 6's second trailer spends about a second and a half on a causeway heading into Vice City. Jason is driving, a pick-up ahead is towing a jet ski, an airliner crosses the sky, and above the lanes there are three overhead signs.
We pulled the frame out of Rockstar's own 2160p master and cropped it. The signs are completely legible, and between them they name the airport, two places nobody has explained, an interstate network and a US route.

What the signs actually say
| Sign | Route | Destinations | Movement |
|---|---|---|---|
| Left | US 35 North | VCI Airport (with an aircraft symbol), Ambrosia | Exit only, left |
| Centre | I-97 to I-397 North | Port VC, Downtown | Through lanes |
| Right, Exit 3 | SW 9th Ave | Southside, Peacock Bay | Exit only, right |
Nothing here is an interpretation. That is what is printed on the signs.
The airport has a name now
Our own landmarks page has been saying, correctly, that Rockstar has confirmed an airport without ever naming one. There is an airport, but not an airport with a name.
That is no longer true. The left-hand sign reads VCI Airport, with the standard aircraft symbol beside it, signposted off US 35 North. VCI is the obvious contraction of Vice City International, which is how every real American city signs its main field, and it is the first time the airport has been given a name in official material.
We have updated the wiki accordingly. This is the whole reason for reading frames rather than press releases.
Southside and Peacock Bay
The right-hand sign is the interesting one. Exit 3, SW 9th Ave, for Southside and Peacock Bay.
Neither name has appeared anywhere else. Not in the trailers' dialogue, not in Rockstar's press copy, not in the district names read off shop signage. They exist because somebody at Rockstar built a road network coherent enough to need exit signage, and the signage names places.
What they are is genuinely open. Southside reads like a broad area rather than a neighbourhood, in the way Miami's own Southside is. Peacock Bay reads like waterfront, and Vice City has a great deal of waterfront. We are not going to guess further than that.
The street name is its own small confirmation. SW 9th Ave follows Miami's quadrant grid, where every address hangs off a north-south and east-west axis and carries NW, NE, SW or SE. Rockstar has imported the addressing system, not just the palm trees.
The road network has numbers
The centre sign carries two interstate shields, 97 and 397, with 397 in the position a spur or a loop takes off a parent route. Real interstate numbering works exactly that way: a three-digit route beginning with an odd digit is a spur, an even digit is a loop, and the last two digits name its parent.
The left-hand sign carries a US 35 shield, which is a different class of road entirely. So Leonida has at least an interstate, a spur off it and a US route, which is a more detailed road hierarchy than any previous game in the series has bothered with.
And the airport exit is also the Ambrosia exit. Ambrosia is the interior industrial region, a long way inland. Signposting it from a causeway on the edge of Vice City tells you the two are connected by a road somebody is expected to drive.

What this does not prove
A name on a sign is not a location you can visit. Grand Theft Auto V signposted places you could never reach, and an airport with a name is not an airport with an interior.
It also does not tell you where any of this is. Exit 3 implies a junction three exits along something, but from which end, on which road, and in which direction is not established by one frame.
What it does do is move four names out of the unknown column: the airport is VCI, Southside and Peacock Bay exist, and the roads have numbers. For a game whose map Rockstar has still not published, that is not nothing.
The frame itself is shot 9 of Trailer 2 in our frame browser, which carries all 88 shots of both trailers with a link back to the second each one was taken from. Check it yourself.
Sources
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