Unscheduled Vehicle Group (UVG)

	[group]
	<aigroup-name>
	<default density? 0 = no traffic by default, 1 = use density of first UVG by default, 2 = ...second..., ...;
		if this is the first UVG, then 1 = use density class Medium by default


[group]
NormalCars
1

[group]
Trucks
0

[group]
Commercials
0

[group]
Ambulance
1