Top
For Ebike Pony Express - See Rock Pi 4B - The perfect RPi - Review and Setup Debian armhf + Ubuntu arm64 Server and NicoD channel
This Calendar - GoogleCalendar - JetRadar - My Apartment in Phuket, Thailand
Top
If each of the 307 most populated citys of the United States had 3 Boring Machines
it would be possible to bore two one way tunnels 3000 miles (or more) long (with escape routes) connecting US caves (used for boarding stations).
See The Boring Company Makes Bricks - The Boring Company completes its first tunnel as Elon Musk sells bricks - List of individual gemstones
Top
Rapid transit - Ebike Pony Express