# OS MRN Known Data Issues

## Live known data issues

| Data Issue Name                                        | Data Issue Description                                                                                                                                                                                                                                                                                                                                                                                                               |
| ------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| Modal Change Node attribution missing                  | <p>Modal Change Points should have an os\_nodetype containing 'Modal Change' and modes, for example, 'Bus Station;Coach Station;Modal Change' or 'Railway Station;Tram Station;Modal Change'. 31 057 modal change nodes currently have a NULL os\_nodetype. As a result there are 77 018 Modal Change Links referencing nodes that are not Modal Change Points.<br><br>This issue is being investigated by our development team.</p> |
| Missing features compared to OS NGD Transport          | <p>A small number of links (<10) are not present in OS MRN, but are present in the corresponding release of OS NGD Transport Network.</p><p></p><p>This issue is being investigated by our development team.</p>                                                                                                                                                                                                                     |
| Records with unexpected vehicle restriction attribute. | <p>A small number of features (<100) have a max height, weight, width or length value which is not in sympathy with the corresponding OS NGD transport link.<br><br>This issue is being investigated by our development team.</p>                                                                                                                                                                                                    |
| Records with unexpected access restriction attribute.  | <p>A small number of features (<100) have 'access', 'access:forward' or 'access:backward' attribute values which are not in sympathy with the corresponding OS NGD transport link.<br><br>This issue is being investigated by our development team.</p>                                                                                                                                                                              |

{% hint style="info" %}
To report an issue not currently listed here, please visit the ['Contact us' page on the OS website](https://www.ordnancesurvey.co.uk/contact-us/business-government/use-os-data).
{% endhint %}


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