> For the complete documentation index, see [llms.txt](https://docs.os.uk/os-downloads/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.os.uk/os-downloads/products/transport-network-portfolio/os-mastermap-highways-network-fundamentals/release-notes/may-2026.md).

# May 2026

## 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](/os-downloads/products/transport-network-portfolio/os-mastermap-highways-network-fundamentals/os-mastermap-highways-network-known-data-issues.md) 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**.


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