Horizontal curvature for ELR SUT1 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 |
|---|---|---|---|
| 243M 1409y - 243M 1430y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |
| 243M 1430y - 243M 1540y | 🟠-🟣🟣🟣-⚪ | Moderate (1,279 m) | Moderately Tight (511 m) to Straight |
| 243M 1540y - 243M 1650y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (572 m) | Moderately Tight (572 m) |
| 243M 1650y - 244M 0000y | 🟡-🟡🟡🟡-🟡 | Moderate (798 m) | Moderate (798 m) |
| 244M 0000y - 244M 0110y | ⭕-🟠🟠🟠-🔵 | Tight (365 m) | Extremely Tight (178 m) to Flat (4,129 m) |
| 244M 0110y - 244M 0220y | ⭕-🟠🟠🟠-⚪ | Moderately Tight (514 m) | Extremely Tight (<100 m) to Straight |
| 244M 0220y - 244M 0330y | ⭕-🟠🟠🟠-⚪ | Moderately Tight (507 m) | Extremely Tight (168 m) to Straight |
| 244M 0330y - 244M 0440y | 🟣-🟣🟣🟣-🟣 | Moderate (1,829 m) | Moderate (1,829 m) |
| 244M 0440y - 244M 0550y | ⭕-⭕⭕⭕-⚪ | Extremely Tight (133 m) | Extremely Tight (<100 m) to Straight |
| 244M 0550y - 244M 0660y | ⭕-⭕⭕⭕-⚪ | Extremely Tight (216 m) | Extremely Tight (115 m) to Straight |
| 244M 0660y - 244M 0770y | ⭕-🔴🔴🔴-⚪ | Very Tight (315 m) | Extremely Tight (182 m) to Straight |
| 244M 0770y - 244M 0880y | ⭕-🔴🔴🔴-🟠 | Very Tight (260 m) | Extremely Tight (179 m) to Moderately Tight (550 m) |
| 244M 0880y - 244M 0990y | ⭕-⭕⭕⭕-🟠 | Extremely Tight (193 m) | Extremely Tight (<100 m) to Tight (487 m) |
| 244M 0990y - 244M 1042y | 🔴-🔴🔴🔴-🔴 | Very Tight (246 m) | Very Tight (246 m) |