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Tube trains could navigate the Underground using the weird rules of Quantum Physics
(www.ianvisits.co.uk)
Instead of relying on conventional sensors, these devices use clouds of atoms cooled to near absolute zero. At those temperatures, atoms start to behave strangely — acting as both particles and waves. As the atoms “fall” through a sensor, their wave patterns shift in response to acceleration. Using what’s effectively an ultra-precise optical ruler, the system can read these changes with extraordinary accuracy, without needing satellites at all.
Is it really too much to place a 50p zigbee proximity sensor, at 100m intervals along a line, and mesh them together?
The totality of tube line sprawl is near 400km[0]. Quick math:
- 400e3/100 = 4000 sensors needed
- 4000 * £0.50 = £2,000
There, I just saved the goverment a million quid
0: https://en.wikipedia.org/wiki/London_Underground_infrastructure#Lines