Horizontal curvature for ELR HPQ 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 |
|---|---|---|---|---|
| 67M 1439y - 67M 1540y | ⭕-🔴🔴🔴-⚪ | Very Tight (329 m) | 197 m → Straight | Parkeston Quay Goods Yard (West) |
| 67M 1540y - 67M 1650y | 🟠-🟠🟠🟠-🟡 | Moderately Tight (663 m) | 541 m → 889 m | |
| 67M 1650y - 68M 0000y | 🟠-🟠🟠🟠-🟡 | Moderately Tight (523 m) | 361 m → 753 m | |
| 68M 0000y - 68M 0110y | ⭕-🟠🟠🟠-⚪ | Tight (468 m) | 212 m → Straight | |
| 68M 0110y - 68M 0220y | ⭕-🟠🟠🟠-⚪ | Tight (419 m) | 157 m → Straight | |
| 68M 0220y - 68M 0330y | 🔴-🟠🟠🟠-⚪ | Tight (446 m) | 349 m → Straight | |
| 68M 0330y - 68M 0440y | 🔵-🟢🟢🟢-⚪ | Very Flat (5,388 m) | 2,275 m → Straight | |
| 68M 0440y - 68M 0550y | 🔴-🟡🟡🟡-⚪ | Moderate (880 m) | 250 m → Straight | |
| 68M 0550y - 68M 0660y | ⭕-🟣🟣🟣-⚪ | Moderate (1,816 m) | <100 m → Straight | |
| 68M 0660y - 68M 0770y | ⭕-🔵🔵🔵-⚪ | Flat (3,209 m) | 222 m → Straight | |
| 68M 0770y - 68M 0880y | 🟠-🟡🟡🟡-🔵 | Moderate (1,066 m) | 503 m → 2,013 m | |
| 68M 0880y - 68M 0990y | 🔵-🔵🔵🔵-🔵 | Moderately Flat (2,715 m) | ||
| 68M 0990y - 68M 1100y | 🟣-🟢🟢🟢-⚪ | Very Flat (9,374 m) | 1,324 m → Straight | |
| 68M 1100y - 68M 1210y | ⭕-🟡🟡🟡-⚪ | Moderate (873 m) | <100 m → Straight | |
| 68M 1210y - 68M 1320y | 🟡-🔵🔵🔵-⚪ | Moderately Flat (2,620 m) | 1,144 m → Straight | |
| 68M 1320y - 68M 1331y | ⚪-⚪⚪⚪-⚪ | Straight | Parkeston Quay Goods Yard (East) |