Zipper Truck - Rapid Tunnel Construction

[Philbert]

Somebody played with Legos as a kid . . . .
(I can think of one guy in Indianola, IA that could have used this!)

http://www.techinsider.io/zipper-truck-constructs-tunnels-faster-2016-2
More videos and better description in this thread (link above)

Philbert

 

[Philbert]

Not to be outdone: 'Road Printer'

Paved blocks

http://www.techinsider.io/roadprinter-can-pave-roads-very-fast-2015-11
(as above, watch both)

Philbert

 

[TJ the Chainsaw Mechanic]

WOW