# Street Type A USRN is assigned to the complete street feature and is made up on junction-to-junction segments. It is mandatory for all USRNs to be assigned a Street Type. All streets must have a Type 1 or a Type 2 USRN assigned, but a Type 3 or Type 4 USRN can also represent the same sections of carriageway that the Type 1 or 2 are assigned to.

A representation of OS Open USRN data against a background map with a Type 2 USRN and a Type 3 USRN highlighted.

### Street Type definitions table The following table provides the definitions for different Street Types:

Value	Definition	Type	Example
Designated Street Name	Official Street Name approved by the relevant authority.	Type 1	High Street, Main Street
Officially Described Street	Description of a street where an official street name has not been provided.	Type 2	Road from Littleton to Fred Farm
Numbered Street	A route or road number allocated by a highway or roads authority.	Type 3	A11
Unofficial Street Name	Street Name that references a Street or part of a Street that is an unofficial local name not designated by the authority.	Type 4	Lovers Lane

### Street Type values table The following table provides the definitions for Street Type values:

Value	Definition
Designated Street Name	Officially named street.
Officially Described Street	Officially described street.
Numbered Street	Officially numbered street.
Unofficial Street Name	Unofficial local name for a street.
Street for addressing purposes only	A street which has been created for addressing purposes of the Local Land and Property Gazetteer (LLPG) in English or Welsh Street Naming Authorities.

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