"A Challenge To Mankind " Future Underground

Major Interstate Channel Is In Red, All other Are Interstate Channels.
Major Is For Very High Speeds Connecting east To west Coast, Using more Than likely
Using All 6 top Train Channel Trains For mass transit.
A High Speed Channel Is like Major where it doesn't make any turns on It's High speed highway.
Intersections Use Major Intersections On Its path like major.
All Other Interstate Channels can Use The Circular Connections At Intersections.
Except it Will not Be As long or The Speeds Will
never reach the Speed Of Eventual High speed Of Major.