September 2025

This release note provides information about the September 2025 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	06 August 2025
Improvement Service Streets Data	05 August 2025
OS Road, Path, and Routing Content	08 August 2025

OS MasterMap Highways Network feature counts

Roads’ Feature	Count
AccessRestriction	35 925
FerryLink	103
FerryNode	132
FerryTerminal	132
Hazard	42 777
HighwayDedication	3 616 770
Maintenance	1 322 629
Reinstatement	1 531 936
RestrictionForVehicles	12 157
Road	856 211
RoadLink	8 527 670
RoadNode	7 556 755
RoadJunction	6 887
SpecialDesignation	797 673
Street	1 495 025
Structure	1 391 159
TurnRestriction	1 049 023

Paths’ Feature	Count
ConnectingLink	1 997 769
ConnectingNode	1 854 463
FerryLink	118
FerryNode	206
FerryTerminal	206
HighwayDedication	408 884
Maintenance	206 454
Path	25 388
PathLink	3 347 946
PathNode	3 950 603
Reinstatement	211 620
SpecialDesignation	13 185
Street	259 103

Data issues

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

Due to differing publication schedules, OS MasterMap Highways customers who also use OS Open TOID or OS Open Linked Identifiers may notice some misalignment of identifiers between these products. This misalignment should be resolved in the next scheduled refresh of OS Open TOID / OS Open Linked Identifiers.

Product updates

As part of our forward scoping, we are currently reviewing the use of the Open Roads Lookup Table CSV included in the OS MasterMap Highways data packages (available in the Resources folder).

We are particularly interested in understanding how the link between Highways and Open Roads is being used in practice, and how widespread its adoption is.

If you actively use the lookup CSV and are happy to share your use cases or provide feedback, we’d love to hear from you. Please get in touch with the Networks Product Team at [email protected].

Next release

The next release of OS MasterMap Highways Network is scheduled for October 2025.