The road network is the spine of any GTA map. Trailer 2's driving frames give us enough material to read the highway structure - or at least the visible parts of it.
We map the visible highways onto their plausible real-Florida analogues. For specific routes, see the driving routes piece.
The highways visible in trailer footage
An interstate-style highway running along the coast - the I-95 analogue. A highway extending south across the bridge route into the Keys - the US-1 analogue. An inland highway crossing the wetlands - the Tamiami Trail analogue. Suburban arterials connecting Vice City to the inland suburbs - matching real-Miami routes like the Palmetto Expressway.
Multi-lane suburban roads, secondary state-route roads through the rural towns, and county-grade roads through orange groves and farmland round out the visible network.
What these analogues do and don't tell us
They tell us the broad shape - coastal interstate, north-south spine through the Keys, east-west inland route, a network of secondary roads. They don't tell us specific route numbers, named exits or distance.
Rockstar typically renames and reroutes real highways. The visible network looks Florida-shaped, not Florida-measured. Treat the analogues as inspiration, not as a road atlas.
Traversal implications
If the highway network maps roughly onto Florida's, cross-state drives feel natural. You can drive the bridge route to the Keys, the coastal interstate north through the suburbs, the inland route through the wetlands. A complete cross-map drive is plausibly long enough to feel like a real road trip while short enough not to be tedious.
Compression applies, of course. We discuss the size question separately in the map size piece.