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OS MasterMap ITN Layer support

From 31 March 2019 our Integrated Transport Network (ITN) product will be withdrawn and replaced by OS MasterMap Highways Network. Find out more about migrating to Highways.

If a satellite navigation device is routing vechicles wrongly can I make changes to ITN to correct this?

We can check the road designation- A road, minor, private,- and if there are any physical or signed restrictions in place though the actual routing from one destination to another is determined by the software and data providers for SatNav devices.

Please see our satellite navigation page for more background and links to report errors to manufacturers.

Will there be links from the ITN Layer to the Local Street Gazetteer (LSG)?

The structure of OS MasterMap allows for data association; therefore, other datasets, such as LSG data, can be linked to the Integrated Transport Network (ITN) Layer TOID. OS MasterMap Highways also links to LSG. Some highway authorities have used the ITN Layer to create a baseline LSG.

What is the definition of public and private roads in the ITN Layer?

The attribution of public and private roads on Ordnance Survey products has traditionally been based upon an assessment of the accessibility and nature of the road by the data collector. Ordnance Survey attempts to record this information accurately, however Ordnance Survey does not decide, and ITN is not the definitive record of, either the responsibility for maintenance or the accessibility for roads. This information is within the remit of the Local Highway Authority.

Normally no formal enquiries surrounding ownership and/or responsibility for maintenance were made. In recent years Ordnance Survey has received feedback from local authorities, via the Department for Transport (DfT), indicating if any roads need to be reclassified from public to private or vice versa. Where these do not clash with Ordnance Survey specification such changes are incorporated into Ordnance Survey vector roads products, such as OS MasterMap Integrated Transport Network Layer (ITN).

What is the difference between "Private Road - Publicly Accessible" and "Private Road - Restricted Access"?

"Private Road - Publicly Accessible"

A privately-maintained road or a road within a property boundary where access by the public using a motor vehicle is considered usual for at least some part of the day. For example, a road within a hospital, sports centre or school. They may extend through a site if more than one entrance exists. If only one entrance exists they are normally created to extend to the principal building within a single site or the boundary of the last property served for features accessing more than one addressed or otherwise identifiable property.They may be captured outside this definition if required to provide connectivity to a track or path.

"Private Road - Restricted Access"

A privately maintained road or a road within a property boundary where access by the public using a motor vehicle is restricted by physical (for example a gate)administrative (for example a sign) means or is not considered usual where you could expect to be challenged as to your use of the road. For example, roads within a military base, an oil refinery, within a private residential garden or leading to two private properties. Such roads are captured only where they exceed 100 m in length or serve more than one addressed or otherwise identifiably separate property. Roads are normally created to extend to the principal building within a single site or the boundary of the last property served for roads serving multiple properties. Two exceptions to this exist:

  • where a track or path exists that the road is connected to, the road must be extended to that point; and
  • where roads within a private residential garden extend for more than 100 m from the property boundary.

Walkers, cyclists or horse riders may or may not be able to use a Private Road, ITN does not currently record this information.

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