Horizontal curvature for ELR WYM 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 |
|---|---|---|---|---|
| 57M 1609y - 57M 1650y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 57M 1650y - 58M 0000y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 58M 0000y - 58M 0110y | 🟡-🟡🟡🟡-🟡 | Moderate (875 m) | Sharnbrook Road overbridge | |
| 58M 0110y - 58M 0220y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 58M 0220y - 58M 0330y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 58M 0330y - 58M 0440y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 58M 0440y - 58M 0550y | 🟡-🟡🟡🟡-🟡 | Moderate (886 m) | ||
| 58M 0550y - 58M 0660y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 58M 0660y - 58M 0770y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 58M 0770y - 58M 0880y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 58M 0880y - 58M 0990y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 58M 0990y - 58M 1100y | 🔵-🔵🔵🔵-🔵 | Flat (3,410 m) | ||
| 58M 1100y - 58M 1210y | 🟠-🟡🟡🟡-⚪ | Moderate (1,075 m) | 645 m → Straight | |
| 58M 1210y - 58M 1320y | 🔵-🔵🔵🔵-🔵 | Moderately Flat (2,136 m) | ||
| 58M 1320y - 58M 1430y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 58M 1430y - 58M 1540y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 58M 1540y - 58M 1650y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 58M 1650y - 59M 0000y | ⚪-⚪⚪⚪-⚪ | Straight | Sharnbrook Tunnel | |
| 59M 0000y - 59M 0110y | ⚪-⚪⚪⚪-⚪ | Straight | Sharnbrook Tunnel | |
| 59M 0110y - 59M 0220y | ⚪-⚪⚪⚪-⚪ | Straight | Sharnbrook Tunnel | |
| 59M 0220y - 59M 0330y | 🔵-🔵🔵🔵-🔵 | Flat (3,321 m) | Sharnbrook Tunnel | |
| 59M 0330y - 59M 0440y | ⚪-⚪⚪⚪-⚪ | Straight | Sharnbrook Tunnel | |
| 59M 0440y - 59M 0550y | ⚪-⚪⚪⚪-⚪ | Straight | Sharnbrook Tunnel | |
| 59M 0550y - 59M 0660y | 🟢-🟢🟢🟢-🟢 | Very Flat (8,222 m) | Sharnbrook Tunnel | |
| 59M 0660y - 59M 0770y | ⚪-⚪⚪⚪-⚪ | Straight | Sharnbrook Tunnel | |
| 59M 0770y - 59M 0880y | ⚪-⚪⚪⚪-⚪ | Straight | Sharnbrook Tunnel | |
| 59M 0880y - 59M 0990y | ⚪-⚪⚪⚪-⚪ | Straight | Sharnbrook Tunnel | |
| 59M 0990y - 59M 1100y | ⚪-⚪⚪⚪-⚪ | Straight | Sharnbrook Tunnel | |
| 59M 1100y - 59M 1210y | 🟢-🟢🟢🟢-🟢 | Very Flat (7,045 m) | Sharnbrook Tunnel | |
| 59M 1210y - 59M 1320y | ⚪-⚪⚪⚪-⚪ | Straight | Sharnbrook Tunnel | |
| 59M 1320y - 59M 1430y | ⚪-⚪⚪⚪-⚪ | Straight | Sharnbrook Tunnel | |
| 59M 1430y - 59M 1540y | ⚪-⚪⚪⚪-⚪ | Straight | Sharnbrook Tunnel | |
| 59M 1540y - 59M 1650y | ⚪-⚪⚪⚪-⚪ | Straight | Sharnbrook Tunnel | |
| 59M 1650y - 60M 0000y | 🔵-🔵🔵🔵-🔵 | Flat (3,042 m) | Sharnbrook Tunnel | |
| 60M 0000y - 60M 0110y | 🟡-🟡🟡🟡-🟡 | Moderate (1,025 m) | Sharnbrook Tunnel | |
| 60M 0110y - 60M 0220y | 🟣-🟣🟣🟣-🟣 | Moderate (1,294 m) | physical deviation (South end) | |
| 60M 0220y - 60M 0330y | 🟡-🟡🟡🟡-🟡 | Moderate (887 m) | ||
| 60M 0330y - 60M 0440y | 🟠-🟠🟠🟠-🟠 | Tight (441 m) | ||
| 60M 0440y - 60M 0550y | 🟠-🟡🟡🟡-🟡 | Moderate (807 m) | 739 m → 871 m | |
| 60M 0550y - 60M 0660y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 60M 0660y - 60M 0770y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 60M 0770y - 60M 0880y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 60M 0880y - 60M 0990y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 60M 0990y - 60M 1100y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 60M 1100y - 60M 1210y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 60M 1210y - 60M 1320y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 60M 1320y - 60M 1430y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 60M 1430y - 60M 1540y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (739 m) | ||
| 60M 1540y - 60M 1650y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (681 m) | ||
| 60M 1650y - 61M 0000y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (562 m) | ||
| 61M 0000y - 61M 0110y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (743 m) | ||
| 61M 0110y - 61M 0220y | 🟠-🟠🟠🟠-🟡 | Moderately Tight (725 m) | 534 m → 955 m | |
| 61M 0220y - 61M 0330y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (671 m) | ||
| 61M 0330y - 61M 0440y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (710 m) | ||
| 61M 0440y - 61M 0550y | 🟡-🟡🟡🟡-🟡 | Moderate (781 m) | ||
| 61M 0550y - 61M 0660y | 🟠-🟡🟡🟡-🟣 | Moderate (793 m) | 595 m → 1,254 m | |
| 61M 0660y - 61M 0770y | 🟡-🟡🟡🟡-🟡 | Moderate (832 m) | ||
| 61M 0770y - 61M 0880y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 61M 0880y - 61M 0990y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 61M 0990y - 61M 1100y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (562 m) | ||
| 61M 1100y - 61M 1210y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (563 m) | ||
| 61M 1210y - 61M 1320y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (716 m) | ||
| 61M 1320y - 61M 1430y | 🟡-🟡🟡🟡-🟡 | Moderate (884 m) | ||
| 61M 1430y - 61M 1540y | 🟡-🟡🟡🟡-🟡 | Moderate (765 m) | ||
| 61M 1540y - 61M 1650y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (727 m) | ||
| 61M 1650y - 62M 0000y | 🟣-🟣🟣🟣-🟣 | Moderate (1,534 m) | physical deviation (North end) | |
| 62M 0000y - 62M 0110y | 🟣-🟣🟣🟣-🟣 | Moderate (1,894 m) | ||
| 62M 0110y - 62M 0220y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 62M 0220y - 62M 0330y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 62M 0330y - 62M 0440y | 🟡-🟡🟡🟡-🟡 | Moderate (996 m) | ||
| 62M 0440y - 62M 0550y | 🟠-🟡🟡🟡-⚪ | Moderate (995 m) | 505 m → Straight | |
| 62M 0550y - 62M 0660y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 62M 0660y - 62M 0678y | ⚪-⚪⚪⚪-⚪ | Straight | former Irchester Jn |