After 140 years, this old technology still keeps trains safe

"Anderson's Piano" is a set of wires and signals at the Pass of Brander, near Falls of Cruachan in Scotland, that try to detect when there might be a boulder on the track. They're 140 years old, and so far no-one's been able to find a better solution — but they're working on it. Thanks to all the team at Network Rail and Scotland's Railway: https://scotlandsrailway.com/ Edited by Michelle Martin https://www.youtube.com/@OnTheCrux 🟥 MORE FROM TOM: https://www.tomscott.com/ (you can find contact details and social links there too) 📰 WEEKLY NEWSLETTER with good stuff from the rest of the internet: https://www.tomscott.com/newsletter/ ❓ LATERAL, free weekly podcast: https://lateralcast.com/ https://youtube.com/lateralcast/ ➕ TOM SCOTT PLUS: https://youtube.com/tomscottplus 👥 THE TECHNICAL DIFFICULTIES: https://youtube.com/techdif