Parking lots 
Parking Lots are sparsely drawn, to prevent cluttering the map. The most important thing is that people can be routed to and from a parking lot. For small Parking Lots, a single road segment often suffices. For large Parking Lots (for example at an event center) consider mapping only the following:
- Main entrances from the roads outside the parking lot
- Lanes that run along entrances of buildings
- Lanes that run along main roads outside the parking area (to separate different speed tracks)
- Large parking lot lanes that serve to get people from one area of the lot to another
Parking Lot Roads need to be defined as such in the menu pane left. They generate a large penalty to prevent thru-traffic in the navigation.