April 2026

This release note provides information about the April 2026 release of OS MasterMap Highways Network.

Source data currency

The following information relates to the currency of the source data used in the creation of this release of OS MasterMap Highways Network:

Data Source	Date
GeoPlace Streets Data	05 March 2026
Improvement Service Streets Data	06 March 2026
OS Road, Path, and Routing Content	06 March 2026

OS MasterMap Highways Network feature counts

Roads’ Feature	Count
AccessRestriction	36 803
FerryLink	103
FerryNode	132
FerryTerminal	132
Hazard	43 687
HighwayDedication	3 631 384
Maintenance	1 328 287
Reinstatement	1 528 280
RestrictionForVehicles	12 306
Road	859 074
RoadLink	8 581 482
RoadNode	7 606 668
RoadJunction	6 884
SpecialDesignation	815 876
Street	1 499 535
Structure	1 406 622
TurnRestriction	1 052 639

Paths’ Feature	Count
ConnectingLink	2 022 580
ConnectingNode	1 875 075
FerryLink	120
FerryNode	208
FerryTerminal	208
HighwayDedication	413 108
Maintenance	207 768
Path	25 454
PathLink	3 405 529
PathNode	4 015 603
Reinstatement	212 923
SpecialDesignation	13 467
Street	261 029

Data issues

Please see the OS MasterMap Highways Network Known Data Issues page for details of live and resolved data issues for the products.

OS Open Roads lookup table

We aim to publish a refreshed OS Open Roads lookup table with OS MasterMap Highways Network – Roads and OS MasterMap Highways Network – RAMI orders twice a year in line with OS Open Roads publication (April and October). Due to unexpected delays, please be aware that the refreshed lookup table will not be published with the April 2026 OS MasterMap Highways Network publication as planned. A refreshed OS Open Roads lookup table will be published as soon as possible and a further update will be provided in the May 2026 OS MasterMap Highways release note.

Next release

The next release of OS MasterMap Highways Network is scheduled for May 2026.