Restriction
Restriction includes turn restrictions, restriction for vehicles, and access restrictions.
Turn restrictions are a restriction based upon a vehicle manoeuvre. This type of restriction includes prohibitive driving instructions, mandatory driving instruction and implicit restrictions. Prohibited instructions are indicated by road signs within a red circle; examples include No U Turn, No Right Turn or No Left Turn. These can include exceptions to the instruction and are typically elements like Except for Buses. Mandatory driving instructions are indicated by road signs within a blue circle or painted on the roadway, such as Turn Right, Ahead Only and Left Turn. Implicit restrictions occur where a turn is not signed as prohibited but would not be a normal manoeuvre. For example, where a road splits around a traffic island or at complex junctions where additional geometry has been captured to reflect the traffic flow. These are not differentiated from actual signed restrictions.
Restriction for vehicles are constraints that apply to the vehicles based on their physical characteristics: height, weight, width and length. These are required to protect structures such as bridges and tunnels from damage, or to restrict / prohibit use by vehicles that exceed specific dimensions, usually for environmental reasons.
Restriction for vehicles has been extended to support the full definition of height, weight, width and length restrictions as defined in the UK to ensure that they can:
Apply to specific vehicle types only
Relate to a structure for which the restriction is designed to protect (for example, a bridge)
Temporal filtering
The earliest date on which you can request a one-off snapshot of a date in the past for data in this feature type is 29 September 2022.
Feature type attributes
The following sub-sections provide details about the attributes included with this feature type, their data types in the different output formats, and other important metadata about them.
osid
Primary identifier for the feature. The OSID is a Globally Unique Identifier (GUID) and requires no centralised authority to ensure uniqueness. Note that the same OSID can occur in more than one feature type when a single feature is represented multiple times in the OS NGD.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 36
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
toid
Topographic Identifier (TOID) of the feature, as published in the OS MasterMap suite of products.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 20
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
versiondate
Date when the version was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
versionavailablefromdate
The date this version of the feature became the latest version.
Data Types: String (GeoJSON), DateTime (GPKG), DateTime (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
versionavailabletodate
The date this version of the feature was superseded by an update or ceased to exist.
Data Types: String (GeoJSON), DateTime (GPKG), DateTime (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
changetype
The type of change that generated a new version of the feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: changetypevalue
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
geometry
Geometry for the feature.
Data Types: Geometry (GeoJSON), Geometry (GPKG), WKT (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Geometry Type: MultiLineString
geometry_length
The measured length of the geometry in metres.
Data Types: Number (GeoJSON), Float (GPKG), Real (CSV)
Nullable: false
Precision: 15
Scale: 6
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
theme
The OS NGD theme to which this feature belongs.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: themevalue
Max Length: 40
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
description
A single descriptive value intended for a quick understanding of what the feature represents.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: restrictiontypedescriptionvalue
Max Length: 24
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
restriction
Nature of the access restriction.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: restrictionvalue
Max Length: 26
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
trafficsign1
A description of the traffic sign indicating the restriction.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 120
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
trafficsign2
A description of the traffic sign indicating the restriction.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 120
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
structure
A built feature with relation to the highway network.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Code List Name: structuretypevalue
Max Length: 40
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
inclusion
Types of vehicle or use that the restriction applies to.
Please note: The max length specified below is the maximum length of 1 permissible value.
Data Types: Array (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Code List Name: vehiclequalifiervalue
Max Length: 38
Multiplicity: [0..]
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
exemption
Types of vehicle or use that are exempt from the restriction.
Please note: The max length specified below is the maximum length of 1 permissible value.
Data Types: Array (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Code List Name: vehiclequalifiervalue
Max Length: 38
Multiplicity: [0..]
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
timeinterval
Time period to which the restriction applies.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 254
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
measure1_value
The measure for the restriction.
Data Types: Number (GeoJSON), Float (GPKG), Real (CSV)
Nullable: true
Precision: 6
Scale: 1
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
measure1_unitofmeasure
The unit that the measure is provided in.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 4
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
measure1_sourceofmeasure
Method of capture or calculation of the measure of restriction.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Code List Name: sourceofmeasurevalue
Max Length: 10
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
measure2_value
The measure for the restriction.
Data Types: Number (GeoJSON), Float (GPKG), Real (CSV)
Nullable: true
Precision: 6
Scale: 1
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
measure2_unitofmeasure
The unit that the measure is provided in.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 4
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
measure2_sourceofmeasure
Method of capture or calculation of the measure of restriction.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Code List Name: sourceofmeasurevalue
Max Length: 10
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
atpositionxcoordinate
The X,Y coordinates of a point along a road link or the X,Y coordinates of the road node.
Data Types: Number (GeoJSON), Float (GPKG), Real (CSV)
Nullable: true
Precision: 10
Scale: 3
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
atpositionycoordinate
The X,Y coordinates of a point along a road link or the X,Y coordinates of the road node.
Data Types: Number (GeoJSON), Float (GPKG), Real (CSV)
Nullable: true
Precision: 10
Scale: 3
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Date Time Qualifier
datetimequalifierid
The OS identifier of the date time qualifier feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 36
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
restrictionid
The identifier for the Restriction feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 36
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
restrictionversiondate
The version date of the Restriction feature.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
nameddate
The named month or period this time interval applies to.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Code List Name: nameddatevalue
Max Length: 9
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
startdate
The date at which the restriction applied starts. This date will be in the format YYYY-MM-DD.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
enddate
The date at which the restriction applied ends. This date will be in the format YYYY-MM-DD.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
startmonthday
The date at which the restriction applied starts. This date will be in the format -MM-DD.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 6
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
endmonthday
The date at which the restriction applied ends. This date will be in the format MM-DD.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 6
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
namedtime
These are named time periods that do not relate to the same time each day.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Code List Name: namedtimevalue
Max Length: 17
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
starttime
The time the restriction begins.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 8
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
endtime
The time the restriction ends.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 8
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
namedperiod
A specified period in which the restriction applies.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Code List Name: namedperiodvalue
Max Length: 28
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
namedday
The named day this restriction applies to.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Code List Name: nameddayvalue
Max Length: 15
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Restriction Network Reference
networkreferenceid
The identifier of the network reference feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 36
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
networkfeaturetype
The type of network feature referenced.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: networkfeaturetypevalue
Max Length: 9
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
roadlinkdirection
The direction in which the restriction applies in relation to the direction of digitisation of a Road Link feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Code List Name: linkdirectionvalue
Max Length: 21
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
roadlinksequence
The order in which the restriction applies to the referenced Road Link features.
Data Types: Integer (GeoJSON), Integer (GPKG), Integer (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
restrictionid
The identifier for the Restriction feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 36
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
restrictionversiondate
The date this version of the feature entered the OS National Geographic Database.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
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