Driving frames carry more weight than people realise. They tell you about traffic AI, road geometry, vehicle physics and how the world handles motion.
For more on density, see the traffic density piece.
Vehicle variety
Sedans. Pickup trucks. Sports cars. SUVs. Motorcycles. Service vehicles. The trailer vehicle pool is diverse - not a rerun of the GTA V stable, but rather a nice clean slate.
Exact vehicle counts have not been confirmed. We believe there will be more vehicles and greater variety than GTA V had. This is due in part to the expansive amount of time spent developing GTA 6 and in part because the city's modern setting demands it.
Driving behaviour
Cars drive like they weigh something in the trailer - they squat when accelerating, press into turns, don't turn instantly. It's not arcadey handling.
Will the released game lean towards arcade or simulation? We don't know yet. The trailer leans realistic; players tend to prefer arcade. Most likely, Rockstar finds a happy medium.
Road geometry visible
Highways that actually have interchanges. Suburban arterials that have correct signage. Bridges that have correct structural details. Everything you see of the roads in the trailer looks deliberately placed, rather than procedurally generated.
Highlighted routes include: the Keys bridge, the causeway, and various streets within Vice City itself.