| Route | Heathrow Airport Link Line |
| Section | Airport Jn to Heathrow Tunnel Jn |
| Remarks | Refer to HLL1 / HLL2 beyond 12M 0672y |
| ELR Maps | Atlas , Interactive |
| Area Maps | Airport Jn , Heathrow Airport |
| Extent | 11M 0031y to 16M 1339y • 5.743 miles • 9.243 km |
| Measured | 9.279 km (Δ +36m) |
| Grouping | HLL , HLL1 , HLL2 |
| Neighbours | HLL1 , HLL2 , MLN1 |
| NR Region | Wales & Western |
 | TRACKmaps Book 3 — Western & Wales |
🏢 Administrative Area
| Mileage | Country | Administrative Area |
|---|---|---|
| 11M 0031y to 16M 1339y | England | Hillingdon |
📍 Nearest Place and District
| Mileage | Nearest Place | District / County | Distance |
|---|---|---|---|
| 11M 0031y to 11M 1682y | Hayes | Greater London - Hillingdon | 501m - 1684m |
| 11M 1683y to 12M 1044y | West Drayton | Greater London - Hillingdon | 1125m - 1674m |
| 12M 1045y to 13M 1638y | Sipson | Greater London - Hillingdon | 340m - 1189m |
| 13M 1639y to 14M 0560y | Harlington | Greater London - Hillingdon | 1206m - 1712m |
| 14M 0561y to 14M 1242y | Sipson | Greater London - Hillingdon | 1727m - 2063m |
| 14M 1243y to 15M 0230y | West Bedfont | Surrey - Spelthorne | 1556m - 2072m |
| 15M 0231y to 15M 0274y | Stanwell | Surrey - Spelthorne | 1519m - 1537m |
| 15M 0275y to 16M 0406y | West Bedfont | Surrey - Spelthorne | 647m - 1500m |
| 16M 0407y to 16M 1339y | East Bedfont | Greater London - Hounslow | 1046m - 1463m |
🏷️ Positional Accuracy Statistics
| Property | Count | Min | Max | Mean | Median | Std Dev |
|---|---|---|---|---|---|---|
| Linear Accuracy | 10 | -0m | 33m | 4m | 0m | 10m |
| Normalised Quarter Miles | 10 | 440y | 452y | 441y | 440y | 4y |
| Calibration Segment Length | 10 | 409y | 1760y | 1011y | 880y | 628y |