Horizontal curvature for ELR SWA 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 |
|---|---|---|---|---|
| 214M 1371y - 214M 1430y | ⭕-⭕⭕⭕-🔴 | Extremely Tight (<100 m) | <100 m → 270 m | Landore Jn |
| 214M 1430y - 214M 1540y | 🔴-🟠🟠🟠-🟡 | Tight (406 m) | 246 m → 892 m | |
| 214M 1540y - 214M 1650y | 🔴-🟠🟠🟠-🟡 | Tight (426 m) | 233 m → 839 m | |
| 214M 1650y - 215M 0000y | ⭕-🔴🔴🔴-🔵 | Very Tight (314 m) | 130 m → 2,668 m | |
| 215M 0000y - 215M 0110y | 🔴-🔴🔴🔴-🟠 | Very Tight (342 m) | 276 m → 486 m | |
| 215M 0110y - 215M 0220y | 🔴-🟠🟠🟠-🔵 | Tight (397 m) | 258 m → 2,009 m | |
| 215M 0220y - 215M 0330y | ⭕-🟠🟠🟠-🟠 | Tight (358 m) | 201 m → 719 m | |
| 215M 0330y - 215M 0440y | 🟡-🔵🔵🔵-🟢 | Moderately Flat (2,401 m) | 903 m → 9,893 m | |
| 215M 0440y - 215M 0550y | 🔵-🔵🔵🔵-⚫ | Moderately Flat (2,948 m) | 2,053 m → 32,012 m | |
| 215M 0550y - 215M 0660y | 🟡-🔵🔵🔵-⚫ | Moderately Flat (2,964 m) | 908 m → 46,565 m | |
| 215M 0660y - 215M 0770y | 🟠-🟡🟡🟡-🟣 | Moderate (795 m) | 355 m → 1,507 m | |
| 215M 0770y - 215M 0880y | 🟠-🟡🟡🟡-🟣 | Moderate (844 m) | 438 m → 1,404 m | |
| 215M 0880y - 215M 0990y | 🔵-🟢🟢🟢-🟢 | Very Flat (7,084 m) | 4,211 m → 11,616 m | Swansea Loop East Jn |
| 215M 0990y - 215M 1100y | 🟡-🟣🟣🟣-🟢 | Moderate (1,477 m) | 889 m → 5,306 m | |
| 215M 1100y - 215M 1210y | 🟠-🟡🟡🟡-⚫ | Moderate (1,082 m) | 603 m → 24,868 m | |
| 215M 1210y - 215M 1320y | 🟢-🟢🟢🟢-🟢 | Very Flat (6,214 m) | 6,103 m → 6,312 m | |
| 215M 1320y - 215M 1430y | 🟡-🔵🔵🔵-🔵 | Moderately Flat (2,533 m) | 897 m → 4,400 m | |
| 215M 1430y - 215M 1540y | ⭕-🟠🟠🟠-⚪ | Tight (402 m) | 162 m → Straight | |
| 215M 1540y - 215M 1650y | 🟠-🟣🟣🟣-⚪ | Moderate (1,399 m) | 740 m → Straight | SWANSEA |
| 215M 1650y - 216M 0000y | 🟠-🟠🟠🟠-🟠 | Tight (488 m) | SWANSEA | |
| 216M 0000y - 216M 0110y | 🟠-🟠🟠🟠-🟠 | Tight (458 m) | 384 m → 573 m | SWANSEA |
| 216M 0110y - 216M 0220y | ⭕-🔵🔵🔵-🟢 | Moderately Flat (2,105 m) | <100 m → 5,968 m | SWANSEA |
| 216M 0220y - 216M 0253y | ⚪-⚪⚪⚪-⚪ | Straight |