Horizontal curvature for ELR BPO 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
1M 0463y - 1M 0550y ⚪-⚪⚪⚪-⚪ StraightStraight
1M 0550y - 1M 0660y ⚪-⚪⚪⚪-⚪ StraightStraight
1M 0660y - 1M 0770y 🔴-🟠🟠🟠-⚪ Moderately Tight (672 m)Very Tight (286 m) to Straight
1M 0770y - 1M 0880y 🟠-🟠🟠🟠-🟠 Tight (408 m)Tight (408 m)
1M 0880y - 1M 0990y ⚪-⚪⚪⚪-⚪ StraightStraight
1M 0990y - 1M 1100y 🔴-🔴🔴🔴-🔴 Very Tight (334 m)Very Tight (334 m)
1M 1100y - 1M 1210y ⭕-⭕⭕⭕-🔴 Extremely Tight (209 m)Extremely Tight (127 m) to Very Tight (279 m)
1M 1210y - 1M 1320y ⭕-🔴🔴🔴-🔴 Very Tight (248 m)Extremely Tight (208 m) to Very Tight (306 m)
1M 1320y - 1M 1430y 🟠-🟠🟠🟠-🟠 Moderately Tight (560 m)Moderately Tight (560 m)
1M 1430y - 1M 1540y 🔴-🟠🟠🟠-🟠 Tight (464 m)Very Tight (234 m) to Moderately Tight (650 m)
1M 1540y - 1M 1650y 🟠-🟠🟠🟠-🟠 Tight (390 m)Tight (390 m)
1M 1650y - 2M 0000y ⚪-⚪⚪⚪-⚪ StraightStraight
2M 0000y - 2M 0110y 🟠-🟠🟠🟠-🟠 Moderately Tight (506 m)Tight (383 m) to Moderately Tight (617 m)
2M 0110y - 2M 0220y ⚪-⚪⚪⚪-⚪ StraightStraight
2M 0220y - 2M 0330y 🟣-🟣🟣🟣-🟣 Moderate (1,794 m)Moderate (1,794 m)
2M 0330y - 2M 0440y 🟠-🟠🟠🟠-🟠 Tight (476 m)Tight (365 m) to Moderately Tight (564 m)
2M 0440y - 2M 0550y 🟠-🟠🟠🟠-🟡 Moderately Tight (737 m)Moderately Tight (716 m) to Moderate (758 m)
2M 0550y - 2M 0660y 🔴-🟠🟠🟠-⚪ Tight (383 m)Very Tight (280 m) to Straight
2M 0660y - 2M 0770y ⚪-⚪⚪⚪-⚪ StraightStraight
2M 0770y - 2M 0880y ⚪-⚪⚪⚪-⚪ StraightStraight
2M 0880y - 2M 0946y ⚪-⚪⚪⚪-⚪ StraightStraight