Horizontal curvature for ELR MCJ1 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 |
|---|---|---|---|---|
| 196M 1640y - 196M 1650y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 196M 1650y - 197M 0000y | ⚪-⚪⚪⚪-⚪ | Straight | Harrow-on-the-Hill South Jn | |
| 197M 0000y - 197M 0110y | ⚪-⚪⚪⚪-⚪ | Straight | Harrow-on-the-Hill South Jn | |
| 197M 0110y - 197M 0220y | 🟡-🔵🔵🔵-⚪ | Moderately Flat (2,401 m) | 934 m → Straight | |
| 197M 0220y - 197M 0330y | 🟣-🟣🟣🟣-🟣 | Moderate (1,700 m) | ||
| 197M 0330y - 197M 0440y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 197M 0440y - 197M 0550y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 197M 0550y - 197M 0660y | 🟡-🟡🟡🟡-🟡 | Moderate (842 m) | ||
| 197M 0660y - 197M 0770y | 🟡-🟡🟡🟡-🟡 | Moderate (958 m) | ||
| 197M 0770y - 197M 0880y | 🟡-🟡🟡🟡-🟡 | Moderate (954 m) | ||
| 197M 0880y - 197M 0990y | 🟣-🟣🟣🟣-🟣 | Moderate (1,537 m) | ||
| 197M 0990y - 197M 1100y | 🟣-🟣🟣🟣-🟣 | Moderate (1,610 m) | ||
| 197M 1100y - 197M 1210y | 🟡-🟡🟡🟡-🟡 | Moderate (1,115 m) | 1,093 m → 1,134 m | |
| 197M 1210y - 197M 1320y | 🟡-🟡🟡🟡-🟡 | Moderate (1,102 m) | ||
| 197M 1320y - 197M 1430y | 🟣-🟣🟣🟣-🟣 | Moderate (1,638 m) | ||
| 197M 1430y - 197M 1540y | 🟡-🟡🟡🟡-🟡 | Moderate (1,059 m) | ||
| 197M 1540y - 197M 1650y | 🟡-🟡🟡🟡-🟡 | Moderate (920 m) | ||
| 197M 1650y - 198M 0000y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 198M 0000y - 198M 0110y | 🟣-🟣🟣🟣-🟣 | Moderate (1,399 m) | ||
| 198M 0110y - 198M 0220y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 198M 0220y - 198M 0330y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 198M 0330y - 198M 0440y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 198M 0440y - 198M 0550y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 198M 0550y - 198M 0660y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 198M 0660y - 198M 0770y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 198M 0770y - 198M 0880y | 🟢-🟢🟢🟢-🟢 | Very Flat (10,262 m) | ||
| 198M 0880y - 198M 0990y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 198M 0990y - 198M 1100y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 198M 1100y - 198M 1210y | 🔵-🔵🔵🔵-🔵 | Flat (4,351 m) | ||
| 198M 1210y - 198M 1320y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 198M 1320y - 198M 1430y | 🟡-🟡🟡🟡-🟡 | Moderate (952 m) | 951 m → 954 m | |
| 198M 1430y - 198M 1540y | 🟡-🟡🟡🟡-🟡 | Moderate (1,041 m) | ||
| 198M 1540y - 198M 1650y | 🟠-🟡🟡🟡-🟡 | Moderate (858 m) | 628 m → 1,112 m | |
| 198M 1650y - 199M 0000y | 🟡-🟡🟡🟡-🟡 | Moderate (802 m) | 788 m → 819 m | |
| 199M 0000y - 199M 0110y | 🟡-🟡🟡🟡-🟡 | Moderate (874 m) | ||
| 199M 0110y - 199M 0220y | 🟡-🟡🟡🟡-🟣 | Moderate (1,133 m) | 766 m → 1,797 m | |
| 199M 0220y - 199M 0330y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 199M 0330y - 199M 0440y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (721 m) | ||
| 199M 0440y - 199M 0550y | 🟡-🟡🟡🟡-🟡 | Moderate (809 m) | ||
| 199M 0550y - 199M 0660y | 🟠-🟡🟡🟡-🟡 | Moderate (761 m) | 603 m → 971 m | |
| 199M 0660y - 199M 0770y | 🟠-🟡🟡🟡-🟡 | Moderate (766 m) | 569 m → 1,000 m | |
| 199M 0770y - 199M 0880y | 🟡-🟡🟡🟡-🟡 | Moderate (903 m) | ||
| 199M 0880y - 199M 0990y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (621 m) | 520 m → 713 m | |
| 199M 0990y - 199M 1100y | 🟠-🟠🟠🟠-🟡 | Moderately Tight (734 m) | 662 m → 790 m | |
| 199M 1100y - 199M 1210y | 🟡-🟡🟡🟡-🟡 | Moderate (1,062 m) | ||
| 199M 1210y - 199M 1320y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 199M 1320y - 199M 1430y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (634 m) | 564 m → 699 m | |
| 199M 1430y - 199M 1540y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (643 m) | ||
| 199M 1540y - 199M 1650y | 🟣-🟣🟣🟣-🟣 | Moderate (1,707 m) | ||
| 199M 1650y - 200M 0000y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 200M 0000y - 200M 0110y | 🟣-🟣🟣🟣-🟣 | Moderate (1,534 m) | 1,254 m → 1,866 m | |
| 200M 0110y - 200M 0220y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 200M 0220y - 200M 0330y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 200M 0330y - 200M 0440y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 200M 0440y - 200M 0550y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 200M 0550y - 200M 0660y | 🟡-🟡🟡🟡-🟡 | Moderate (984 m) | ||
| 200M 0660y - 200M 0770y | 🟢-⚫⚫⚫-⚪ | Extremely Flat (38,794 m) | 16,345 m → Straight | |
| 200M 0770y - 200M 0880y | 🟣-🟣🟣🟣-🟣 | Moderate (1,284 m) | ||
| 200M 0880y - 200M 0990y | 🟣-🟣🟣🟣-🟣 | Moderate (1,878 m) | ||
| 200M 0990y - 200M 1100y | 🟣-🔵🔵🔵-⚪ | Moderately Flat (2,494 m) | 1,335 m → Straight | |
| 200M 1100y - 200M 1210y | 🔵-🔵🔵🔵-⚪ | Flat (3,061 m) | 2,128 m → Straight | |
| 200M 1210y - 200M 1320y | 🟢-🟢🟢🟢-🟢 | Very Flat (5,817 m) | ||
| 200M 1320y - 200M 1430y | ⚪-⚪⚪⚪-⚪ | Straight | Neasden South Jn | |
| 200M 1430y - 200M 1540y | 🟠-🟣🟣🟣-⚪ | Moderate (1,830 m) | 386 m → Straight | |
| 200M 1540y - 200M 1650y | ⭕-🟠🟠🟠-🔵 | Moderately Tight (543 m) | 182 m → 3,312 m | |
| 200M 1650y - 201M 0000y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 201M 0000y - 201M 0110y | 🔵-🔵🔵🔵-🔵 | Flat (3,304 m) | ||
| 201M 0110y - 201M 0220y | 🟣-🟣🟣🟣-🟣 | Moderate (1,478 m) | ||
| 201M 0220y - 201M 0330y | 🟡-🟡🟡🟡-🟡 | Moderate (1,117 m) | 1,010 m → 1,222 m | |
| 201M 0330y - 201M 0440y | 🔵-🔵🔵🔵-🔵 | Moderately Flat (2,005 m) | ||
| 201M 0440y - 201M 0550y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 201M 0550y - 201M 0660y | 🟣-🟣🟣🟣-🟣 | Moderate (1,872 m) | ||
| 201M 0660y - 201M 0770y | 🟣-🟣🟣🟣-🟣 | Moderate (1,808 m) | ||
| 201M 0770y - 201M 0880y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 201M 0880y - 201M 0990y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 201M 0990y - 201M 1100y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 201M 1100y - 201M 1210y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 201M 1210y - 201M 1320y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 201M 1320y - 201M 1430y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 201M 1430y - 201M 1540y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 201M 1540y - 201M 1650y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 201M 1650y - 202M 0000y | 🟢-🟢🟢🟢-🟢 | Very Flat (6,018 m) | ||
| 202M 0000y - 202M 0110y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 202M 0110y - 202M 0220y | 🟡-🟡🟡🟡-🟡 | Moderate (874 m) | ||
| 202M 0220y - 202M 0330y | 🔵-🔵🔵🔵-🔵 | Moderately Flat (2,873 m) | ||
| 202M 0330y - 202M 0440y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (584 m) | 550 m → 623 m | |
| 202M 0440y - 202M 0550y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 202M 0550y - 202M 0660y | 🟡-🟡🟡🟡-🟡 | Moderate (984 m) | ||
| 202M 0660y - 202M 0770y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 202M 0770y - 202M 0880y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 202M 0880y - 202M 0990y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 202M 0990y - 202M 1100y | 🟢-🟢🟢🟢-🟢 | Very Flat (10,248 m) | ||
| 202M 1100y - 202M 1210y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 202M 1210y - 202M 1320y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 202M 1320y - 202M 1430y | 🟡-🟡🟡🟡-🟡 | Moderate (993 m) | ||
| 202M 1430y - 202M 1540y | 🔵-🔵🔵🔵-🔵 | Flat (3,026 m) | ||
| 202M 1540y - 202M 1650y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 202M 1650y - 203M 0000y | 🟡-🟡🟡🟡-🟡 | Moderate (755 m) | ||
| 203M 0000y - 203M 0110y | 🟠-🟠🟠🟠-🟡 | Moderately Tight (741 m) | 686 m → 845 m | Factory Yards Viaduct |
| 203M 0110y - 203M 0220y | 🟡-🟡🟡🟡-🟡 | Moderate (1,096 m) | Factory Yards Viaduct | |
| 203M 0220y - 203M 0330y | ⚪-⚪⚪⚪-⚪ | Straight | Factory Yards Viaduct | |
| 203M 0330y - 203M 0440y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 203M 0440y - 203M 0550y | 🟡-🟣🟣🟣-🟢 | Moderate (1,884 m) | 1,166 m → 6,131 m | Steel Viaduct |
| 203M 0550y - 203M 0660y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (508 m) | 495 m → 521 m | Steel Viaduct |
| 203M 0660y - 203M 0770y | 🟣-🟣🟣🟣-🟣 | Moderate (1,567 m) | Steel Viaduct | |
| 203M 0770y - 203M 0880y | ⚪-⚪⚪⚪-⚪ | Straight | Steel Viaduct | |
| 203M 0880y - 203M 0990y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 203M 0990y - 203M 1100y | 🔵-🔵🔵🔵-🔵 | Moderately Flat (2,604 m) | ||
| 203M 1100y - 203M 1210y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 203M 1210y - 203M 1320y | 🟣-🟣🟣🟣-🟣 | Moderate (1,504 m) | ||
| 203M 1320y - 203M 1430y | 🟡-🟡🟡🟡-🟡 | Moderate (1,036 m) | ||
| 203M 1430y - 203M 1540y | 🟣-🟣🟣🟣-🟣 | Moderate (1,332 m) | ||
| 203M 1540y - 203M 1650y | ⭕-🔴🔴🔴-🟠 | Very Tight (329 m) | 221 m → 415 m | |
| 203M 1650y - 204M 0000y | 🔴-🔴🔴🔴-🟠 | Very Tight (348 m) | 340 m → 357 m | |
| 204M 0000y - 204M 0110y | 🔴-🔴🔴🔴-🔴 | Very Tight (310 m) | 308 m → 312 m | Hampstead Tunnel |
| 204M 0110y - 204M 0220y | 🔴-🟠🟠🟠-🟠 | Tight (383 m) | 309 m → 510 m | Hampstead Tunnel |
| 204M 0220y - 204M 0330y | ⭕-🔴🔴🔴-🟠 | Very Tight (348 m) | 206 m → 455 m | Hampstead Tunnel |
| 204M 0330y - 204M 0440y | 🟠-🟠🟠🟠-🟠 | Tight (431 m) | 428 m → 433 m | Hampstead Tunnel |
| 204M 0440y - 204M 0550y | ⭕-🔴🔴🔴-🟠 | Very Tight (285 m) | 204 m → 384 m | Hampstead Tunnel; Lords Tunnel |
| 204M 0550y - 204M 0660y | 🔴-🔴🔴🔴-🟠 | Very Tight (340 m) | 231 m → 381 m | Hampstead Tunnel; Lords Tunnel |
| 204M 0660y - 204M 0770y | ⚪-⚪⚪⚪-⚪ | Straight | Hampstead Tunnel; Lords Tunnel | |
| 204M 0770y - 204M 0880y | ⚪-⚪⚪⚪-⚪ | Straight | Lords Tunnel | |
| 204M 0880y - 204M 0990y | ⚪-⚪⚪⚪-⚪ | Straight | Lords Tunnel; St John’s Wood Tunnel | |
| 204M 0990y - 204M 1100y | ⚪-⚪⚪⚪-⚪ | Straight | Lords Tunnel; St John’s Wood Tunnel | |
| 204M 1100y - 204M 1210y | ⭕-🟠🟠🟠-🟡 | Tight (444 m) | 177 m → 863 m | Lords Tunnel; St John’s Wood Tunnel |
| 204M 1210y - 204M 1320y | 🟠-🟠🟠🟠-🟠 | Tight (396 m) | Lords Tunnel; St John’s Wood Tunnel | |
| 204M 1320y - 204M 1430y | 🟠-🟠🟠🟠-🟠 | Tight (454 m) | 406 m → 513 m | Lords Tunnel; St John’s Wood Tunnel |
| 204M 1430y - 204M 1540y | 🔴-🟠🟠🟠-🟠 | Tight (479 m) | 336 m → 619 m | Lords Tunnel; St John’s Wood Tunnel |
| 204M 1540y - 204M 1650y | 🟠-🟠🟠🟠-🟠 | Tight (431 m) | 355 m → 487 m | Lords Tunnel; St John’s Wood Tunnel |
| 204M 1650y - 205M 0000y | 🟠-🟠🟠🟠-🟠 | Tight (497 m) | 486 m → 513 m | Lords Tunnel; St John’s Wood Tunnel |
| 205M 0000y - 205M 0110y | 🟡-🟡🟡🟡-🟡 | Moderate (863 m) | Lords Tunnel; St John’s Wood Tunnel | |
| 205M 0110y - 205M 0220y | ⚪-⚪⚪⚪-⚪ | Straight | Lords Tunnel; St John’s Wood Tunnel | |
| 205M 0220y - 205M 0330y | 🟣-🟣🟣🟣-🟣 | Moderate (1,356 m) | Lords Tunnel; St John’s Wood Tunnel | |
| 205M 0330y - 205M 0440y | 🟡-🟡🟡🟡-🟡 | Moderate (847 m) | 810 m → 898 m | Lords Tunnel; St John’s Wood Tunnel |
| 205M 0440y - 205M 0550y | 🟡-🟡🟡🟡-🟡 | Moderate (1,055 m) | Lords Tunnel; St John’s Wood Tunnel | |
| 205M 0550y - 205M 0660y | ⚪-⚪⚪⚪-⚪ | Straight | Lords Tunnel; St John’s Wood Tunnel | |
| 205M 0660y - 205M 0770y | ⚪-⚪⚪⚪-⚪ | Straight | Lords Tunnel; St John’s Wood Tunnel | |
| 205M 0770y - 205M 0880y | ⚪-⚪⚪⚪-⚪ | Straight | Lords Tunnel | |
| 205M 0880y - 205M 0990y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 205M 0990y - 205M 1100y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 205M 1100y - 205M 1210y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 205M 1210y - 205M 1320y | 🟠-🟣🟣🟣-⚪ | Moderate (1,570 m) | 476 m → Straight | MARYLEBONE |
| 205M 1320y - 205M 1430y | ⭕-🔴🔴🔴-⚪ | Very Tight (300 m) | <100 m → Straight | MARYLEBONE |
| 205M 1430y - 205M 1540y | 🟡-🟡🟡🟡-🟡 | Moderate (1,219 m) | MARYLEBONE | |
| 205M 1540y - 205M 1650y | ⚪-⚪⚪⚪-⚪ | Straight | MARYLEBONE | |
| 205M 1650y - 206M 0000y | 🟣-⚪⚪⚪-⚪ | Straight | 1,527 m → Straight | MARYLEBONE |
| 206M 0000y - 206M 0041y | ⚪-⚪⚪⚪-⚪ | Straight |