Route
In Brazil it flies the published corridors. In the US, honest direct legs.
The planner knows Brazil's published REA and REH visual corridors point by point: entry gates, altitude bands, mandatory direction. For US flights it plans direct legs and analyzes the airspace and active TFRs along them — corridor routing itself exists only in Brazil, because only Brazil publishes these corridors.
Airspace limits from official FAA data. Always check the current chart before flight.