Horizontal curvature for ELR BTH2 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 |
|---|---|---|---|---|
| 14M 1446y - 14M 1540y | 🔵-🟢🟢🟢-⚪ | Very Flat (5,742 m) | 2,418 m → Straight | Sutton East Jn |
| 14M 1540y - 14M 1650y | 🟣-🟣🟣🟣-🟣 | Moderate (1,442 m) | SUTTON | |
| 14M 1650y - 15M 0000y | ⚪-⚪⚪⚪-⚪ | Straight | SUTTON | |
| 15M 0000y - 15M 0110y | 🟢-🟢🟢🟢-🟢 | Very Flat (5,839 m) | 5,112 m → 6,304 m | SUTTON; Sutton West Jn |
| 15M 0110y - 15M 0220y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 15M 0220y - 15M 0330y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 15M 0330y - 15M 0440y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 15M 0440y - 15M 0550y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 15M 0550y - 15M 0660y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 15M 0660y - 15M 0770y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 15M 0770y - 15M 0880y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 15M 0880y - 15M 0990y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 15M 0990y - 15M 1100y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 15M 1100y - 15M 1210y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 15M 1210y - 15M 1320y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 15M 1320y - 15M 1430y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 15M 1430y - 15M 1540y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 15M 1540y - 15M 1650y | â•-â•â•â•-🟠| Extremely Tight (216 m) | <100 m → 353 m | CHEAM |
| 15M 1650y - 16M 0000y | 🔵-🔵🔵🔵-🔵 | Flat (3,137 m) | CHEAM | |
| 16M 0000y - 16M 0110y | ⚪-⚪⚪⚪-⚪ | Straight | CHEAM | |
| 16M 0110y - 16M 0220y | 🟡-🟡🟡🟡-🟡 | Moderate (946 m) | ||
| 16M 0220y - 16M 0330y | 🟠-🟠🟠🟠-🟠| Moderately Tight (678 m) | ||
| 16M 0330y - 16M 0440y | 🟠-🟠🟠🟠-🟡 | Moderately Tight (707 m) | 590 m → 802 m | |
| 16M 0440y - 16M 0550y | 🟠-🟡🟡🟡-🟡 | Moderate (843 m) | 661 m → 1,077 m | |
| 16M 0550y - 16M 0660y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 16M 0660y - 16M 0770y | 🟡-🟡🟡🟡-🟡 | Moderate (821 m) | ||
| 16M 0770y - 16M 0880y | 🔵-🔵🔵🔵-🔵 | Moderately Flat (2,313 m) | ||
| 16M 0880y - 16M 0990y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 16M 0990y - 16M 1100y | 🔵-🔵🔵🔵-🔵 | Moderately Flat (2,742 m) | ||
| 16M 1100y - 16M 1210y | 🟢-🟢🟢🟢-🟢 | Very Flat (7,552 m) | ||
| 16M 1210y - 16M 1320y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 16M 1320y - 16M 1430y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 16M 1430y - 16M 1540y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 16M 1540y - 16M 1650y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 16M 1650y - 17M 0000y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 17M 0000y - 17M 0110y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 17M 0110y - 17M 0220y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 17M 0220y - 17M 0330y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 17M 0330y - 17M 0440y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 17M 0440y - 17M 0550y | ⚪-⚪⚪⚪-⚪ | Straight | EWELL EAST | |
| 17M 0550y - 17M 0660y | ⚪-⚪⚪⚪-⚪ | Straight | EWELL EAST | |
| 17M 0660y - 17M 0770y | ⚪-⚪⚪⚪-⚪ | Straight | EWELL EAST | |
| 17M 0770y - 17M 0880y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 17M 0880y - 17M 0990y | 🟡-🟡🟡🟡-🟡 | Moderate (1,053 m) | ||
| 17M 0990y - 17M 1100y | 🟠-🟡🟡🟡-🟡 | Moderate (806 m) | 700 m → 891 m | |
| 17M 1100y - 17M 1210y | 🔵-🔵🔵🔵-🔵 | Moderately Flat (2,438 m) | ||
| 17M 1210y - 17M 1320y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 17M 1320y - 17M 1430y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 17M 1430y - 17M 1540y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 17M 1540y - 17M 1650y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 17M 1650y - 18M 0000y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 18M 0000y - 18M 0110y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 18M 0110y - 18M 0220y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 18M 0220y - 18M 0330y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 18M 0330y - 18M 0440y | 🟣-🟣🟣🟣-🟣 | Moderate (1,340 m) | ||
| 18M 0440y - 18M 0550y | 🟠-🟠🟠🟠-🟠| Tight (497 m) | 456 m → 524 m | |
| 18M 0550y - 18M 0660y | 🟠-🟠🟠🟠-🟠| Moderately Tight (561 m) | 448 m → 680 m | |
| 18M 0660y - 18M 0770y | 🟠-🟠🟠🟠-🟡 | Moderately Tight (589 m) | 441 m → 754 m | |
| 18M 0770y - 18M 0880y | 🟠-🟠🟠🟠-🟠| Moderately Tight (503 m) | 470 m → 554 m | |
| 18M 0880y - 18M 0990y | 🟠-🟠🟠🟠-🟠| Moderately Tight (556 m) | ||
| 18M 0990y - 18M 1100y | â•-🟠🟠🟠-🟠| Tight (354 m) | 194 m → 526 m | |
| 18M 1100y - 18M 1210y | 🟠-🟠🟠🟠-🟠| Tight (450 m) | ||
| 18M 1210y - 18M 1320y | â•-🟠🟠🟠-⚪ | Tight (404 m) | 225 m → Straight | |
| 18M 1320y - 18M 1430y | â•-🔴🔴🔴-⚪ | Very Tight (282 m) | <100 m → Straight | EPSOM |
| 18M 1430y - 18M 1540y | â•-🟠🟠🟠-🟡 | Tight (483 m) | 113 m → 1,028 m | EPSOM |
| 18M 1540y - 18M 1650y | 🟠-🟡🟡🟡-⚪ | Moderate (875 m) | 614 m → Straight | EPSOM |
| 18M 1650y - 19M 0000y | 🔴-🟠🟠🟠-⚪ | Moderately Tight (688 m) | 302 m → Straight | Epsom Jn |
| 19M 0000y - 19M 0002y | ⚪-⚪⚪⚪-⚪ | Straight |