Horizontal curvature for ELR PED4 is based on the digitised notional centre-line, calculated in 100 metre sections. The average radius computation is weighted, however this should be treated as indicative only. The computed minimum and maximum radii are shown for completeness, and often report a much tighter radius than the physical railway. Radii calculations are influenced by the digitisation quality, and often produce inaccurate values at the extremities of the ELR, areas of tracks divergence, and locations of very tight curvature.
| Mileage | Schematic | Average Radius | Radius Range | Features |
|---|---|---|---|---|
| 15M 0746y - 15M 0770y | 🟠-🟠🟠🟠-🟣 | Moderately Tight (600 m) | 539 m → 1,671 m | |
| 15M 0770y - 15M 0880y | ⚫-⚫⚫⚫-⚫ | Extremely Flat (20,676 m) | former Mexborough No.1 Jn | |
| 15M 0880y - 15M 0990y | 🟢-🟢🟢🟢-🟢 | Very Flat (11,516 m) | ||
| 15M 0990y - 15M 1100y | 🟠-🔵🔵🔵-🟢 | Moderately Flat (2,287 m) | 660 m → 7,391 m | |
| 15M 1100y - 15M 1210y | 🟡-🟣🟣🟣-🟣 | Moderate (1,269 m) | 911 m → 1,625 m | |
| 15M 1210y - 15M 1320y | 🟠-🟣🟣🟣-🟢 | Moderate (1,330 m) | 638 m → 6,357 m | Mexborough Jn |
| 15M 1320y - 15M 1419y | ⭕-🟠🟠🟠-🟢 | Moderately Tight (610 m) | <100 m → 5,592 m |