May 2026

This release note provides information about the May 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	08 April 2026
Improvement Service Streets Data	07 April 2026
OS Road, Path, and Routing Content	08 April 2026

OS MasterMap Highways Network feature counts

Roads’ Feature	Count
AccessRestriction	36 871
FerryLink	103
FerryNode	132
FerryTerminal	132
Hazard	43 711
HighwayDedication	3 636 030
Maintenance	1 330 126
Reinstatement	1 529 963
RestrictionForVehicles	12 313
Road	859 808
RoadLink	8 592 116
RoadNode	7 616 878
RoadJunction	6 896
SpecialDesignation	817 338
Street	1 500 738
Structure	1 408 008
TurnRestriction	1 053 141

Paths’ Feature	Count
ConnectingLink	2 027 298
ConnectingNode	1 878 992
FerryLink	120
FerryNode	208
FerryTerminal	208
HighwayDedication	418 127
Maintenance	210 641
Path	25 494
PathLink	3 417 000
PathNode	4 028 194
Reinstatement	215 793
SpecialDesignation	13 474
Street	263 946

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, the refreshed lookup table was not published with the April 2026 OS MasterMap Highways Network publication as planned. A refreshed OS Open Roads lookup table will be published with the May 2026 OS MasterMap Highways Network.

Next release

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