Standard Gauge Railway
Design Standards & Specifications
Technical requirements for the Eastern and Northern SGR routes.
Specifications
Parameters & Proposed Standards
| Parameter | Proposed Standard |
|---|---|
| Standard | AREMA or equivalent or better |
| Track gauge | Standard Gauge (1.435 m) |
| Design life | 100 yrs main structures; 60 yrs subgrade/sleepers/OCS; 50 yrs secondary; 30 yrs replaceable |
| Main lines | Single track; major structures built for double track |
| Speed — freight | 100 kph (containerised); 80 kph (conventional) |
| Speed — passenger | 120 kph |
| Permanent speed restrictions | None except in exceptional circumstances |
| Axle loading | 25 t / 32.5 t on major structures |
| Structure gauge | AREMA gauge, compatible with regional SGR |
| Crossing loops | Minimum 880 m, spaced ≤ 20 km apart |
| Gradient | 1.20% maximum |
| Horizontal curvature | 1,200 m radius |
| Vertical curvature | 10,000 m radius maximum |
| Corridor width | 60 m (30 m in urban areas) |
| Rails | 60 kg/m continuously welded |
| Sleepers | Prestressed monoblock concrete, 1,667/km (600 mm spacing) |
| Rail fastenings | Elastic (anti-vandal) |
| Ballast | Crushed rock ≥ 300 mm thick, 400 mm shoulder |
| Sub-ballast | Crushed rock ≥ 200 mm thick |
| Main line turnouts | 60 kg/m rail for 120 kph, max 1 in 12, R = 500 |
| Traction | Electric, 25 kV AC catenary; 2×25 kV; SCADA |
| Freight stock | Double-stack well wagons, ≥ 75 t payload |
| Passenger stock | Double-decker coaches |
| Signalling | Automatic ERTMS/ETCS level 2 baseline 3 |
| Level crossings | Grade separation for major roads; automatic barriers otherwise |
| Corridor marking | RC pillars at 200 m (straight) / 100 m (curves) |
| Corridor fencing | Entire corridor preferred; initially urban areas + markers |
| Drainage return period | 300 yrs (major), 100 yrs (medium), 50 yrs (minor) |
| Slope protection | Stone pitching, herringbone, grassing, shotcrete |
| Marshalling yard / workshop | Arrival/departure, classification, maintenance, testing, support lines |