Horizontal curvature for ELR HDS 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.

MileageSchematicAverage RadiusRadius Range
3M 0700y - 3M 0770y ⚪-⚪⚪⚪-⚪ StraightStraight
3M 0770y - 3M 0880y 🟠-🟣🟣🟣-🔵 Moderate (1,464 m)Moderately Tight (674 m) to Flat (4,335 m)
3M 0880y - 3M 0990y 🔴-🟡🟡🟡-🟡 Moderate (767 m)Very Tight (272 m) to Moderate (1,122 m)
3M 0990y - 3M 1100y 🟡-🟡🟡🟡-🟡 Moderate (757 m)Moderate (757 m)
3M 1100y - 3M 1210y 🟠-🟠🟠🟠-🟠 Moderately Tight (665 m)Moderately Tight (665 m)
3M 1210y - 3M 1320y ⚪-⚪⚪⚪-⚪ StraightStraight
3M 1320y - 3M 1430y 🔵-🔵🔵🔵-🔵 Moderately Flat (2,236 m)Moderately Flat (2,236 m)
3M 1430y - 3M 1540y ⚪-⚪⚪⚪-⚪ StraightStraight
3M 1540y - 3M 1650y 🔵-🔵🔵🔵-🔵 Moderately Flat (2,212 m)Moderately Flat (2,212 m)
3M 1650y - 4M 0000y ⚪-⚪⚪⚪-⚪ StraightStraight
4M 0000y - 4M 0110y ⚪-⚪⚪⚪-⚪ StraightStraight
4M 0110y - 4M 0220y 🔴-🟠🟠🟠-🟠 Tight (399 m)Very Tight (285 m) to Moderately Tight (700 m)
4M 0220y - 4M 0330y 🟠-🟡🟡🟡-🔵 Moderate (778 m)Tight (452 m) to Flat (4,143 m)
4M 0330y - 4M 0440y ⚪-⚪⚪⚪-⚪ StraightStraight
4M 0440y - 4M 0550y ⚪-⚪⚪⚪-⚪ StraightStraight
4M 0550y - 4M 0660y ⚪-⚪⚪⚪-⚪ StraightStraight
4M 0660y - 4M 0770y ⚪-⚪⚪⚪-⚪ StraightStraight
4M 0770y - 4M 0880y 🟢-🟢🟢🟢-🟢 Very Flat (6,368 m)Very Flat (6,368 m)
4M 0880y - 4M 0990y 🟡-🟡🟡🟡-🟡 Moderate (1,174 m)Moderate (1,174 m)
4M 0990y - 4M 1100y ⚪-⚪⚪⚪-⚪ StraightStraight
4M 1100y - 4M 1210y 🟣-🟣🟣🟣-🟣 Moderate (1,541 m)Moderate (1,541 m)
4M 1210y - 4M 1320y ⚪-⚪⚪⚪-⚪ StraightStraight
4M 1320y - 4M 1346y ⚪-⚪⚪⚪-⚪ StraightStraight