Horizontal curvature for ELR ARH 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 |
|---|---|---|---|---|
| 30M 0970y - 30M 0990y | 🟢-🟢🟢🟢-🟢 | Very Flat (7,698 m) | Holm Jn | |
| 30M 0990y - 30M 1100y | ⭕-🟠🟠🟠-🔵 | Tight (416 m) | <100 m → 3,637 m | |
| 30M 1100y - 30M 1210y | ⭕-🔴🔴🔴-🟢 | Very Tight (245 m) | 103 m → 10,766 m | |
| 30M 1210y - 30M 1320y | ⭕-🟡🟡🟡-🟢 | Moderate (1,095 m) | 198 m → 5,428 m | |
| 30M 1320y - 30M 1430y | ⭕-🟠🟠🟠-🔵 | Tight (460 m) | 202 m → 4,750 m | |
| 30M 1430y - 30M 1540y | 🔴-🟠🟠🟠-🟠 | Tight (448 m) | 304 m → 655 m | |
| 30M 1540y - 30M 1650y | 🟠-🟠🟠🟠-🟠 | Tight (466 m) | 373 m → 642 m | |
| 30M 1650y - 31M 0000y | 🔴-🟠🟠🟠-🟡 | Tight (467 m) | 242 m → 1,044 m | ARDROSSAN TOWN |
| 31M 0000y - 31M 0110y | 🟠-🟠🟠🟠-🔵 | Moderately Tight (536 m) | 351 m → 2,054 m | ARDROSSAN TOWN |
| 31M 0110y - 31M 0220y | ⭕-🟠🟠🟠-⚫ | Moderately Tight (607 m) | 150 m → 24,385 m | ARDROSSAN TOWN |
| 31M 0220y - 31M 0330y | ⭕-⭕⭕⭕-🟠 | Extremely Tight (201 m) | 128 m → 422 m | |
| 31M 0330y - 31M 0440y | ⭕-⭕⭕⭕-🔴 | Extremely Tight (218 m) | 163 m → 287 m | |
| 31M 0440y - 31M 0550y | ⭕-⭕⭕⭕-🔴 | Extremely Tight (214 m) | 133 m → 339 m | |
| 31M 0550y - 31M 0660y | ⭕-🟠🟠🟠-🟣 | Tight (426 m) | 108 m → 1,491 m | |
| 31M 0660y - 31M 0770y | 🟡-🔵🔵🔵-🟢 | Flat (3,698 m) | 966 m → 15,875 m | ARDROSSAN HARBOUR |
| 31M 0770y - 31M 0880y | 🟡-🟣🟣🟣-🔵 | Moderate (1,613 m) | 1,094 m → 3,412 m | ARDROSSAN HARBOUR |
| 31M 0880y - 31M 0975y | ⚪-⚪⚪⚪-⚪ | Straight |