What is the difference between light rail and heavy rail?
GB light rail and heavy rail differ in rail specifications (weight/size), capacity, and application: Heavy rail (e.g., 43kg, 60kg) uses thicker, heavier steel for high-capacity, long-distance, high-speed freight/passenger trains (like main lines) with dedicated signaling, while Light rail (e.g., 8kg, 24kg) uses lighter, smaller rails for urban, lower-capacity needs (trams, industrial) often sharing roads, featuring simpler infrastructure and driver-controlled operation.
GB Heavy Rail
- Rail Spec: Heavier, larger cross-sections (e.g., 38kg, 43kg, 50kg, 60kg per meter).
| Classification | Height(mm) | Head (mm) | Bottom (mm) | Thick(mm) | Weight (kg/m) | |
| Heavy Rail | 38 KG/M | 134 | 68 | 114 | 13 | 38.733 |
| 43 KG/M | 140 | 70 | 114 | 14.5 | 44.653 | |
| 45 KG/M | 145 | 67 | 126 | 14.5 | 45.546 | |
| 50 KG/M | 152 | 70 | 132 | 15.5 | 51.514 | |
| 60 KG/M | 176 | 73 | 150 | 16.5 | 60.64 | |
- Application: Mainline railways, high-haul freight, high-capacity city metro/subways.
- Capacity: High, for heavy loads and large passenger volumes.
- Operation: Requires robust support, longer distances between stops, and relies heavily on centralized signaling systems.
GB Light Rail
- Rail Spec: Lighter, smaller cross-sections (e.g., 8kg, 24kg).
| Classification | Height(mm) | Head (mm) | Bottom (mm) | Thick(mm) | Weight (kg/m) | |
| Light Rail | 8 KG/M | 65 | 25 | 54 | 7 | 8.42 |
| 9 KG/M | 63.5 | 32.1 | 63.5 | 5.9 | 8.94 | |
| 12 KG/M | 69.85 | 38.1 | 69.85 | 7.54 | 12.2 | |
| 15 KG/M | 79.37 | 42.86 | 79.37 | 8.33 | 15.2 | |
| 18 KG/M | 80 | 40 | 80 | 10 | 18.06 | |
- Application: Urban transport (trams, streetcars), industrial/mining internal tracks, shorter urban loops (like Hong Kong's Tuen Mun/Yuen Long Light Rail).
- Capacity: Lower, designed for urban flexibility and frequent, shorter trips.
- Operation: More flexible, often runs on shared road space (not always grade-separated), with simpler infrastructure and driver control.
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