Horizontal curvature for ELR TWN 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 |
|---|---|---|---|---|
| 65M 0422y - 65M 0440y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 65M 0440y - 65M 0550y | 🟠-🟠🟠🟠-🟠 | Tight (464 m) | Thorpe-le-Soken Jn | |
| 65M 0550y - 65M 0660y | 🟡-🟡🟡🟡-🟡 | Moderate (950 m) | 853 m → 1,068 m | |
| 65M 0660y - 65M 0770y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (706 m) | ||
| 65M 0770y - 65M 0880y | 🟠-🟠🟠🟠-🟡 | Moderately Tight (681 m) | 499 m → 1,042 m | |
| 65M 0880y - 65M 0990y | 🟡-🟡🟡🟡-🟡 | Moderate (871 m) | ||
| 65M 0990y - 65M 1100y | 🟡-🟡🟡🟡-🟡 | Moderate (888 m) | ||
| 65M 1100y - 65M 1210y | 🟣-🟣🟣🟣-🟣 | Moderate (1,854 m) | ||
| 65M 1210y - 65M 1320y | 🟡-🟡🟡🟡-🟡 | Moderate (888 m) | 862 m → 923 m | |
| 65M 1320y - 65M 1430y | 🟣-🟣🟣🟣-🟣 | Moderate (1,335 m) | ||
| 65M 1430y - 65M 1540y | 🟠-🟡🟡🟡-🟡 | Moderate (780 m) | 706 m → 844 m | |
| 65M 1540y - 65M 1650y | 🟠-🟠🟠🟠-🟡 | Moderately Tight (673 m) | 571 m → 782 m | |
| 65M 1650y - 66M 0000y | 🟡-🟡🟡🟡-🟡 | Moderate (762 m) | ||
| 66M 0000y - 66M 0110y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (565 m) | Divergence from COC | |
| 66M 0110y - 66M 0220y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (626 m) | ||
| 66M 0220y - 66M 0330y | 🟡-🟡🟡🟡-🟡 | Moderate (767 m) | ||
| 66M 0330y - 66M 0440y | 🟡-🟡🟡🟡-🟡 | Moderate (778 m) | ||
| 66M 0440y - 66M 0550y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (733 m) | 723 m → 743 m | |
| 66M 0550y - 66M 0660y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (607 m) | 577 m → 655 m | |
| 66M 0660y - 66M 0770y | 🟠-🟠🟠🟠-🟡 | Moderately Tight (705 m) | 632 m → 808 m | |
| 66M 0770y - 66M 0880y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (673 m) | ||
| 66M 0880y - 66M 0990y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (560 m) | 451 m → 691 m | |
| 66M 0990y - 66M 1100y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (606 m) | 528 m → 727 m | |
| 66M 1100y - 66M 1210y | 🟡-🟡🟡🟡-🟡 | Moderate (778 m) | ||
| 66M 1210y - 66M 1320y | 🔵-🔵🔵🔵-🔵 | Moderately Flat (2,259 m) | ||
| 66M 1320y - 66M 1430y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 66M 1430y - 66M 1540y | 🟡-🟡🟡🟡-🟡 | Moderate (757 m) | ||
| 66M 1540y - 66M 1650y | 🟠-🟠🟠🟠-🟡 | Moderately Tight (553 m) | 411 m → 759 m | |
| 66M 1650y - 67M 0000y | 🔴-🟠🟠🟠-🟡 | Moderately Tight (513 m) | 311 m → 808 m | |
| 67M 0000y - 67M 0110y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (525 m) | ||
| 67M 0110y - 67M 0220y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (584 m) | ||
| 67M 0220y - 67M 0330y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (508 m) | 420 m → 604 m | |
| 67M 0330y - 67M 0440y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (579 m) | ||
| 67M 0440y - 67M 0550y | 🟡-🟡🟡🟡-🟡 | Moderate (834 m) | ||
| 67M 0550y - 67M 0660y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 67M 0660y - 67M 0770y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 67M 0770y - 67M 0880y | 🔵-🔵🔵🔵-🔵 | Flat (3,348 m) | ||
| 67M 0880y - 67M 0990y | 🔵-🔵🔵🔵-⚪ | Flat (4,639 m) | 2,909 m → Straight | |
| 67M 0990y - 67M 1100y | ⚪-⚪⚪⚪-⚪ | Straight | KIRBY CROSS | |
| 67M 1100y - 67M 1210y | ⚪-⚪⚪⚪-⚪ | Straight | KIRBY CROSS | |
| 67M 1210y - 67M 1320y | 🟠-🟣🟣🟣-⚪ | Moderate (1,401 m) | 658 m → Straight | KIRBY CROSS |
| 67M 1320y - 67M 1430y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 67M 1430y - 67M 1540y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 67M 1540y - 67M 1650y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 67M 1650y - 68M 0000y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 68M 0000y - 68M 0110y | 🔵-🔵🔵🔵-🔵 | Flat (3,103 m) | ||
| 68M 0110y - 68M 0220y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 68M 0220y - 68M 0330y | 🔵-🔵🔵🔵-🔵 | Flat (4,502 m) | ||
| 68M 0330y - 68M 0440y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 68M 0440y - 68M 0550y | 🔵-🔵🔵🔵-🔵 | Flat (4,764 m) | ||
| 68M 0550y - 68M 0660y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 68M 0660y - 68M 0770y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 68M 0770y - 68M 0880y | 🔵-🔵🔵🔵-🔵 | Moderately Flat (2,605 m) | ||
| 68M 0880y - 68M 0990y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 68M 0990y - 68M 1100y | 🔵-🔵🔵🔵-🔵 | Moderately Flat (2,058 m) | ||
| 68M 1100y - 68M 1210y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 68M 1210y - 68M 1320y | 🔵-🔵🔵🔵-🔵 | Moderately Flat (2,826 m) | ||
| 68M 1320y - 68M 1430y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 68M 1430y - 68M 1540y | 🟡-🟡🟡🟡-🟡 | Moderate (1,076 m) | FRINTON | |
| 68M 1540y - 68M 1650y | 🟡-🟡🟡🟡-🟡 | Moderate (1,221 m) | FRINTON | |
| 68M 1650y - 69M 0000y | 🟠-🟣🟣🟣-🟢 | Moderate (1,505 m) | 741 m → 14,550 m | FRINTON |
| 69M 0000y - 69M 0110y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 69M 0110y - 69M 0220y | 🟠-🟡🟡🟡-🟡 | Moderate (836 m) | 687 m → 1,014 m | |
| 69M 0220y - 69M 0330y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (688 m) | ||
| 69M 0330y - 69M 0440y | 🟠-🟠🟠🟠-🟠 | Tight (428 m) | 415 m → 442 m | |
| 69M 0440y - 69M 0550y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (736 m) | ||
| 69M 0550y - 69M 0660y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (590 m) | 575 m → 600 m | |
| 69M 0660y - 69M 0770y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (555 m) | 549 m → 563 m | |
| 69M 0770y - 69M 0880y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (578 m) | ||
| 69M 0880y - 69M 0990y | 🔵-🔵🔵🔵-🔵 | Flat (3,512 m) | ||
| 69M 0990y - 69M 1100y | 🟢-🟢🟢🟢-🟢 | Very Flat (11,714 m) | ||
| 69M 1100y - 69M 1210y | ⚫-⚫⚫⚫-⚫ | Extremely Flat (38,492 m) | ||
| 69M 1210y - 69M 1320y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 69M 1320y - 69M 1430y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 69M 1430y - 69M 1540y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 69M 1540y - 69M 1650y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 69M 1650y - 70M 0000y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 70M 0000y - 70M 0110y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 70M 0110y - 70M 0220y | ⭕-🔴🔴🔴-🔴 | Very Tight (250 m) | 165 m → 319 m | WALTON-ON-THE-NAZE |
| 70M 0220y - 70M 0330y | ⭕-⭕⭕⭕-🔴 | Extremely Tight (207 m) | 159 m → 226 m | WALTON-ON-THE-NAZE |
| 70M 0330y - 70M 0353y | ⚪-⚪⚪⚪-⚪ | Straight | WALTON-ON-THE-NAZE |