Horizontal curvature for ELR PPH 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 |
|---|---|---|---|---|
| 49M 0917y - 49M 0990y | ⚪-⚪⚪⚪-⚪ | Straight | Preston Park Jn | |
| 49M 0990y - 49M 1100y | ⭕-🔴🔴🔴-🟢 | Very Tight (296 m) | 128 m → 12,678 m | |
| 49M 1100y - 49M 1210y | ⭕-🔴🔴🔴-🟡 | Very Tight (266 m) | <100 m → 857 m | |
| 49M 1210y - 49M 1320y | ⭕-🔴🔴🔴-🟣 | Very Tight (304 m) | 151 m → 1,351 m | Cliftonville Tunnel |
| 49M 1320y - 49M 1430y | ⚪-⚪⚪⚪-⚪ | Straight | Cliftonville Tunnel | |
| 49M 1430y - 49M 1540y | ⚪-⚪⚪⚪-⚪ | Straight | Cliftonville Tunnel | |
| 49M 1540y - 49M 1650y | ⚪-⚪⚪⚪-⚪ | Straight | Cliftonville Tunnel | |
| 49M 1650y - 50M 0000y | ⚪-⚪⚪⚪-⚪ | Straight | Cliftonville Tunnel | |
| 50M 0000y - 50M 0110y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 50M 0110y - 50M 0220y | 🔴-🟠🟠🟠-🟡 | Moderately Tight (536 m) | 234 m → 1,012 m | |
| 50M 0220y - 50M 0330y | ⭕-🔴🔴🔴-🔴 | Very Tight (278 m) | 192 m → 313 m | |
| 50M 0330y - 50M 0440y | ⭕-🔴🔴🔴-🔴 | Very Tight (270 m) | 220 m → 297 m | |
| 50M 0440y - 50M 0550y | ⭕-🔴🔴🔴-🔴 | Very Tight (244 m) | 172 m → 298 m | |
| 50M 0550y - 50M 0660y | ⭕-🔴🔴🔴-🟠 | Very Tight (246 m) | 137 m → 361 m | |
| 50M 0660y - 50M 0770y | 🟠-🔵🔵🔵-⚪ | Moderately Flat (2,939 m) | 434 m → Straight | |
| 50M 0770y - 50M 0880y | ⭕-🟡🟡🟡-⚪ | Moderate (860 m) | <100 m → Straight | Hove Jn |
| 50M 0880y - 50M 0990y | 🟠-🟢🟢🟢-⚪ | Very Flat (9,322 m) | 670 m → Straight | |
| 50M 0990y - 50M 1100y | 🔵-🟢🟢🟢-⚪ | Very Flat (10,628 m) | 3,201 m → Straight | |
| 50M 1100y - 50M 1210y | 🟠-🟡🟡🟡-⚪ | Moderate (1,207 m) | 412 m → Straight | HOVE |
| 50M 1210y - 50M 1320y | 🟣-🟣🟣🟣-🟣 | Moderate (1,327 m) | HOVE | |
| 50M 1320y - 50M 1430y | ⚪-⚪⚪⚪-⚪ | Straight | HOVE | |
| 50M 1430y - 50M 1540y | ⭕-🟡🟡🟡-⚪ | Moderate (1,098 m) | <100 m → Straight | |
| 50M 1540y - 50M 1551y | ⚪-⚪⚪⚪-⚪ | Straight |