Horizontal curvature for ELR LFS1 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 |
|---|---|---|---|---|
| 100M 1746y - 101M 0000y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 101M 0000y - 101M 0110y | ⭕-🔴🔴🔴-🟣 | Very Tight (300 m) | <100 m → 1,527 m | Larkfield Jn |
| 101M 0110y - 101M 0220y | ⭕-⭕⭕⭕-🔴 | Extremely Tight (193 m) | 118 m → 314 m | |
| 101M 0220y - 101M 0330y | ⭕-⭕⭕⭕-🟡 | Extremely Tight (186 m) | 110 m → 901 m | |
| 101M 0330y - 101M 0440y | ⭕-🟠🟠🟠-🟢 | Moderately Tight (589 m) | 156 m → 8,067 m | former Langside Jn |
| 101M 0440y - 101M 0453y | ⚪-⚪⚪⚪-⚪ | Straight |