Horizontal curvature for ELR PTP 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 |
|---|---|---|---|
| 13M 0875y - 13M 0880y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |
| 13M 0880y - 13M 0990y | 🟠-🟡🟡🟡-🟢 | Moderate (756 m) | Tight (371 m) to Very Flat (14,891 m) |
| 13M 0990y - 13M 1100y | ⭕-🔴🔴🔴-🟣 | Very Tight (301 m) | Extremely Tight (180 m) to Moderate (1,853 m) |
| 13M 1100y - 13M 1210y | 🟡-🟣🟣🟣-🟢 | Moderate (1,916 m) | Moderate (944 m) to Very Flat (7,021 m) |
| 13M 1210y - 13M 1320y | 🟡-🟡🟡🟡-🟣 | Moderate (1,149 m) | Moderate (863 m to 1,452 m) |
| 13M 1320y - 13M 1425y | 🟠-🟠🟠🟠-🟠 | Tight (365 m) | Tight (365 m) |