Dammond, William Hunter
1873-1956 · Contribution: 1906
Military & Safety
Color-coded railway signal system indicating track conditions
Portraits are AI-generated interpretations, not photographs.
Quick facts
- Born
- 1873-1956
- Category
- Military & Safety
Impact on the world
Dammond helped establish the green-amber-red signaling convention that governs rail and road traffic worldwide, and his track-circuit system made rail signaling safer.
Sources
- Google Patents (US 823,513 & US 747,949)
1 more sources and references are available to members.
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