Horizontal curvature for ELR SSP 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 |
|---|---|---|---|---|
| 0M -216y - 0M -110y | 🟣-🟣🟣🟣-🟣 | Moderate (1,569 m) | ||
| 0M -110y - 0M 0000y | 🟢-🟢🟢🟢-🟢 | Very Flat (8,364 m) | ||
| 0M 0000y - 0M 0110y | 🔵-🔵🔵🔵-🔵 | Flat (3,305 m) | Perry Barr South Jn | |
| 0M 0110y - 0M 0220y | ⭕-🟠🟠🟠-⚪ | Tight (480 m) | 111 m → Straight | |
| 0M 0220y - 0M 0330y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 0M 0330y - 0M 0440y | ⭕-🔴🔴🔴-🟠 | Very Tight (279 m) | 178 m → 537 m | |
| 0M 0440y - 0M 0550y | ⭕-⭕⭕⭕-🔴 | Extremely Tight (210 m) | 161 m → 246 m | |
| 0M 0550y - 0M 0660y | 🔴-🔴🔴🔴-🔴 | Very Tight (240 m) | 228 m → 249 m | |
| 0M 0660y - 0M 0770y | ⭕-⭕⭕⭕-🔴 | Extremely Tight (195 m) | 122 m → 244 m | |
| 0M 0770y - 0M 0880y | ⭕-🔴🔴🔴-🟡 | Very Tight (236 m) | 156 m → 818 m | Perry Barr West Jn |
| 0M 0880y - 0M 0990y | ⭕-🟣🟣🟣-🟢 | Moderate (1,279 m) | 124 m → 6,555 m | |
| 0M 0990y - 0M 1100y | 🟠-🟠🟠🟠-🟠 | Tight (415 m) | 380 m → 461 m | |
| 0M 1100y - 0M 1210y | ⭕-🔴🔴🔴-🟠 | Very Tight (309 m) | 214 m → 400 m | |
| 0M 1210y - 0M 1320y | 🔴-🔴🔴🔴-🔴 | Very Tight (334 m) | 319 m → 350 m | |
| 0M 1320y - 0M 1430y | 🟠-🟠🟠🟠-🟡 | Moderately Tight (706 m) | 546 m → 899 m | |
| 0M 1430y - 0M 1540y | 🔴-🟠🟠🟠-🟠 | Tight (443 m) | 325 m → 606 m | Hamstead Tunnel |
| 0M 1540y - 0M 1650y | 🔴-🟡🟡🟡-⚪ | Moderate (811 m) | 262 m → Straight | Hamstead Tunnel |
| 0M 1650y - 1M 0000y | 🔴-🟠🟠🟠-🟠 | Tight (395 m) | 347 m → 444 m | |
| 1M 0000y - 1M 0110y | 🔴-🔴🔴🔴-🟠 | Very Tight (344 m) | 303 m → 385 m | |
| 1M 0110y - 1M 0220y | 🔴-🔴🔴🔴-🟠 | Very Tight (308 m) | 243 m → 402 m | |
| 1M 0220y - 1M 0330y | 🟠-🟠🟠🟠-🟡 | Moderately Tight (588 m) | 464 m → 886 m | |
| 1M 0330y - 1M 0440y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 1M 0440y - 1M 0550y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 1M 0550y - 1M 0660y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 1M 0660y - 1M 0770y | 🟡-🟡🟡🟡-🟡 | Moderate (955 m) | ||
| 1M 0770y - 1M 0880y | 🔴-🟠🟠🟠-🟠 | Tight (391 m) | 302 m → 426 m | |
| 1M 0880y - 1M 0990y | 🟡-🟡🟡🟡-🟣 | Moderate (1,141 m) | 845 m → 1,655 m | |
| 1M 0990y - 1M 1100y | ⭕-🔴🔴🔴-🟠 | Very Tight (346 m) | 207 m → 509 m | |
| 1M 1100y - 1M 1210y | 🔴-🔴🔴🔴-🟠 | Very Tight (317 m) | 237 m → 394 m | |
| 1M 1210y - 1M 1320y | 🟠-🟠🟠🟠-🟠 | Tight (365 m) | 362 m → 368 m | |
| 1M 1320y - 1M 1430y | 🔴-🔴🔴🔴-🟠 | Very Tight (334 m) | 245 m → 409 m | |
| 1M 1430y - 1M 1540y | 🟡-🟡🟡🟡-🟡 | Moderate (1,124 m) | ||
| 1M 1540y - 1M 1650y | 🟠-🟡🟡🟡-🟡 | Moderate (773 m) | 517 m → 988 m | |
| 1M 1650y - 2M 0000y | 🟠-🟠🟠🟠-🟡 | Moderately Tight (741 m) | 405 m → 1,076 m | |
| 2M 0000y - 2M 0110y | 🟠-🟡🟡🟡-🟡 | Moderate (850 m) | 748 m → 994 m | |
| 2M 0110y - 2M 0220y | 🟠-🟠🟠🟠-🔵 | Moderately Tight (697 m) | 520 m → 3,854 m | |
| 2M 0220y - 2M 0330y | 🟠-🟡🟡🟡-🟣 | Moderate (807 m) | 588 m → 1,543 m | |
| 2M 0330y - 2M 0440y | 🟡-🔵🔵🔵-🟢 | Moderately Flat (2,155 m) | 955 m → 19,956 m | |
| 2M 0440y - 2M 0550y | 🟠-🟣🟣🟣-⚫ | Moderate (1,342 m) | 372 m → 34,872 m | |
| 2M 0550y - 2M 0660y | 🔴-🟠🟠🟠-🟠 | Tight (380 m) | 276 m → 709 m | |
| 2M 0660y - 2M 0770y | ⭕-🟠🟠🟠-⚪ | Tight (356 m) | 178 m → Straight | |
| 2M 0770y - 2M 0880y | ⭕-🟠🟠🟠-⚪ | Tight (396 m) | <100 m → Straight | |
| 2M 0880y - 2M 0990y | ⭕-🔴🔴🔴-🟠 | Very Tight (282 m) | 200 m → 351 m | Soho East Jn |
| 2M 0990y - 2M 1100y | ⭕-🔴🔴🔴-🟠 | Very Tight (285 m) | 205 m → 467 m | |
| 2M 1100y - 2M 1210y | 🔴-🟠🟠🟠-🟣 | Tight (454 m) | 238 m → 1,543 m | |
| 2M 1210y - 2M 1320y | ⭕-🔴🔴🔴-🟠 | Very Tight (307 m) | 176 m → 474 m | |
| 2M 1320y - 2M 1430y | 🔴-🟡🟡🟡-🔵 | Moderate (938 m) | 343 m → 2,501 m | |
| 2M 1430y - 2M 1540y | 🟠-🔵🔵🔵-⚪ | Moderately Flat (2,873 m) | 653 m → Straight | |
| 2M 1540y - 2M 1643y | 🟠-🟡🟡🟡-⚪ | Moderate (781 m) | 496 m → Straight | Soho South Jn |