Horizontal curvature for ELR HIW 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
0M -135y - 0M -110y ⚪-⚪⚪⚪-⚪ StraightStraight
0M -110y - 0M 0000y ⭕-🔴🔴🔴-⚪ Very Tight (338 m)Extremely Tight (<100 m) to Straight
0M 0000y - 0M 0110y ⭕-⭕⭕⭕-🔴 Extremely Tight (173 m)Extremely Tight (<100 m) to Very Tight (256 m)
0M 0110y - 0M 0220y ⭕-⭕⭕⭕-🔴 Extremely Tight (188 m)Extremely Tight (139 m) to Very Tight (228 m)
0M 0220y - 0M 0330y 🟠-🟠🟠🟠-⚪ Moderately Tight (722 m)Tight (351 m) to Straight
0M 0330y - 0M 0440y ⚪-⚪⚪⚪-⚪ StraightStraight
0M 0440y - 0M 0550y ⭕-🟡🟡🟡-⚪ Moderate (817 m)Extremely Tight (111 m) to Straight
0M 0550y - 0M 0660y 🔴-🟣🟣🟣-⚪ Moderate (1,467 m)Very Tight (279 m) to Straight
0M 0660y - 0M 0770y ⚪-⚪⚪⚪-⚪ StraightStraight
0M 0770y - 0M 0880y ⚪-⚪⚪⚪-⚪ StraightStraight
0M 0880y - 0M 0990y ⚪-⚪⚪⚪-⚪ StraightStraight
0M 0990y - 0M 1100y ⭕-⭕⭕⭕-⚪ Extremely Tight (200 m)Extremely Tight (<100 m) to Straight
0M 1100y - 0M 1210y ⭕-🟣🟣🟣-⚪ Moderate (1,577 m)Extremely Tight (<100 m) to Straight
0M 1210y - 0M 1320y ⭕-🟠🟠🟠-⚪ Tight (390 m)Extremely Tight (<100 m) to Straight
0M 1320y - 0M 1430y 🟠-🟠🟠🟠-🟠 Tight (463 m)Tight (355 m) to Moderately Tight (578 m)
0M 1430y - 0M 1540y 🟠-🟠🟠🟠-🟠 Tight (453 m)Tight (364 m) to Moderately Tight (568 m)
0M 1540y - 0M 1650y 🟠-🟠🟠🟠-🟠 Tight (441 m)Tight (438 m to 446 m)
0M 1650y - 1M 0000y ⭕-🟣🟣🟣-⚫ Moderate (1,424 m)Extremely Tight (195 m) to Extremely Flat (42,345 m)
1M 0000y - 1M 0090y ⚪-⚪⚪⚪-⚪ StraightStraight