Mike Baier(@Mike__Baier):This is Prufrock, riding The Monster, riding an SPMT, driving through Las Vegas. After we retrieve a machine, an SPMT drives directly under The Monster. That lets us move this 530,000 lb Prufrock section plus the ~140k lb Monster through city streets. The SPMT is a self-propelled modular transporter: dozens of independently steered axles that can crawl, crab, and rotate a load this size around an intersection. When we get to the next site, The Monster tilts ±10° and launches Prufrock straight into the ground.

Mike Baier

@Mike__Baier

Removing traffic from the world one tunnel at a time. Director of Production, Electrical, and Software Engineering at The Boring Company

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Mike Baier@Mike__Baier

2026.08.18 21:06

This is Prufrock, riding The Monster, riding an SPMT, driving through Las Vegas. After we retrieve a machine, an SPMT drives directly under The Monster. That lets us move this 530,000 lb Prufrock section plus the ~140k lb Monster through city streets. The SPMT is a self-propelled modular transporter: dozens of independently steered axles that can crawl, crab, and rotate a load this size around an intersection. When we get to the next site, The Monster tilts ±10° and launches Prufrock straight into the ground.