Nice direction — traffic that reads differently by profile is what sells “navigate, don’t just floor it.”

A few profiles that usually create readable unpredictability without chaos: cautious gap-hunters who leave room then panic-brake; aggressive left-lane stickers who cut late; hesitant merge-waiters who stall the flow; and one occasional wrong-lane wanderer so players learn to scan, not memorize patterns.

Even tiny differences in reaction delay + preferred following distance go a long way before you need fancy pathfinding.