Regardless of how I change the map layout, traffic in/out flow or truck/car ratio I seem to get the best results when I crank accel, speed and right bias for trucks to the max and lane-change threshold and following distance to the minimum.
Which makes sense since those are basically the ideal conditions for reducing the number of obstructions low speed (merging, exiting, trucks on grade) traffic poses to higher speed traffic and reduces the effective road area of the obstruction.
Because aggressive driving is dangerous? Perhaps aggressive driving also contributes negatively to the overall flow in the real world when not everyone drives equally aggressive (i.e. through extra lane switches caused). But I don't know much about traffic analysis so idk.
Which makes sense since those are basically the ideal conditions for reducing the number of obstructions low speed (merging, exiting, trucks on grade) traffic poses to higher speed traffic and reduces the effective road area of the obstruction.