Horizontal curvature for ELR BGL1 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 |
|---|---|---|---|---|
| 93M 0133y - 93M 0220y | 🟢-⚫⚫⚫-⚪ | Extremely Flat (29,437 m) | 16,839 m → Straight | Gloucester Yard Jn |
| 93M 0220y - 93M 0330y | 🟣-🔵🔵🔵-⚫ | Flat (3,020 m) | 1,842 m → 31,550 m | |
| 93M 0330y - 93M 0440y | 🟣-🟣🟣🟣-🟣 | Moderate (1,795 m) | ||
| 93M 0440y - 93M 0550y | 🟣-🟣🟣🟣-🟣 | Moderate (1,324 m) | ||
| 93M 0550y - 93M 0660y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 93M 0660y - 93M 0770y | 🔵-🔵🔵🔵-🔵 | Moderately Flat (2,404 m) | ||
| 93M 0770y - 93M 0880y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 93M 0880y - 93M 0990y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 93M 0990y - 93M 1100y | 🔵-🔵🔵🔵-🔵 | Flat (4,438 m) | ||
| 93M 1100y - 93M 1210y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 93M 1210y - 93M 1320y | 🔵-🔵🔵🔵-🔵 | Moderately Flat (2,550 m) | ||
| 93M 1320y - 93M 1430y | 🔵-🔵🔵🔵-🔵 | Flat (3,023 m) | ||
| 93M 1430y - 93M 1540y | 🔵-🔵🔵🔵-🔵 | Flat (3,739 m) | 3,690 m → 3,802 m | |
| 93M 1540y - 93M 1650y | 🔵-🔵🔵🔵-🔵 | Flat (3,350 m) | 2,511 m → 4,472 m | |
| 93M 1650y - 94M 0000y | 🟢-🟢🟢🟢-🟢 | Very Flat (8,718 m) | ||
| 94M 0000y - 94M 0110y | 🔵-🟢🟢🟢-🟢 | Very Flat (5,441 m) | 3,622 m → 14,014 m | |
| 94M 0110y - 94M 0220y | 🟣-🔵🔵🔵-🟢 | Moderately Flat (2,748 m) | 1,890 m → 5,200 m | |
| 94M 0220y - 94M 0330y | 🟣-🔵🔵🔵-🟢 | Moderately Flat (2,026 m) | 1,951 m → 11,269 m | |
| 94M 0330y - 94M 0440y | ⚪-⚪⚪⚪-⚪ | Straight | former Tuffley Jn | |
| 94M 0440y - 94M 0550y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 94M 0550y - 94M 0660y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 94M 0660y - 94M 0770y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 94M 0770y - 94M 0880y | ⚪-⚪⚪⚪-⚪ | Straight | ||
| 94M 0880y - 94M 0942y | ⚪-⚪⚪⚪-⚪ | Straight |