Horizontal curvature for ELR FNS1 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 |
|---|---|---|---|
| 114M 1600y - 114M 1650y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |
| 114M 1650y - 115M 0000y | ⭕-🔴🔴🔴-⚪ | Very Tight (315 m) | Extremely Tight (154 m) to Straight |
| 115M 0000y - 115M 0110y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (719 m) | Moderately Tight (719 m) |
| 115M 0110y - 115M 0220y | 🔴-🟠🟠🟠-🟠 | Moderately Tight (535 m) | Very Tight (329 m) to Moderately Tight (707 m) |
| 115M 0220y - 115M 0330y | 🔴-🔴🔴🔴-🔴 | Very Tight (298 m) | Very Tight (298 m) |
| 115M 0330y - 115M 0440y | 🟠-🟣🟣🟣-⚪ | Moderate (1,383 m) | Moderately Tight (711 m) to Straight |
| 115M 0440y - 115M 0550y | ⭕-🔴🔴🔴-🟠 | Very Tight (261 m) | Extremely Tight (139 m) to Moderately Tight (571 m) |
| 115M 0550y - 115M 0660y | ⭕-🔴🔴🔴-🔴 | Very Tight (261 m) | Extremely Tight (216 m) to Very Tight (298 m) |
| 115M 0660y - 115M 0770y | ⭕-🔴🔴🔴-🟠 | Very Tight (266 m) | Extremely Tight (190 m) to Moderately Tight (588 m) |
| 115M 0770y - 115M 0880y | ⭕-⭕⭕⭕-⭕ | Extremely Tight (199 m) | Extremely Tight (190 m to 208 m) |
| 115M 0880y - 115M 0990y | 🔴-🔴🔴🔴-🔴 | Very Tight (247 m) | Very Tight (247 m) |
| 115M 0990y - 115M 1100y | 🟣-🟣🟣🟣-🟣 | Moderate (1,362 m) | Moderate (1,362 m) |
| 115M 1100y - 115M 1210y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |
| 115M 1210y - 115M 1320y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |
| 115M 1320y - 115M 1430y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |
| 115M 1430y - 115M 1442y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |