10.3.3.1
If a Street crosses a Local Highway Authority administrative boundary a new Street must be created for each section of Street in each Local Highway Authority.
10.3.3.2
If a Street crosses a Local Highway Authority administrative boundary and then re-enters the Local Highway Authority at another point, non-continuous Streets can exist. Each Authority Street Custodian must decide whether to create a new USRN for each section within their Local Highway Authority, or if the Street can exist in a non-continuous fashion.
10.3.3.3 Scenario 1 – Boundary perpendicular to a Street
For an example see Figure 29 and Figure 30. In each case a new USRN from the SNN Authority’s range must be allocated to the Street and the start and end points agreed between both Local Highway Authorities.
Figure 29 - Street crossing Local Highway Authority administrative boundary example 1
Figure 30 - Street crossing Local Highway Authority administrative boundary example 2
10.3.3.4 Scenario 2 – LHA boundary along the centreline of a Street
If a Local Highway Authority administrative boundary runs down the centre of a Street, each Local Highway Authority must enter the Street into the LSG with a USRN from the respective SNN Authority’s District Council or Unitary Council range. For an example see Figure 31.
10.3.3.5
The ESU start and end points must be agreed by both SNN Authorities (either a District Council or a Unitary Council). The same ESU ID must be used in both gazetteers, to ensure that the centreline geometry is not duplicated. Both LHAs must do the following:
- Enter an interest Record of part road.
- Indicate in the ADDITIONAL_STREET_LOCATION_TEXT which part of the Street the LHA is responsible for.
- Indicate in the ADDITIONAL_STREET_LOCATION_TEXT which part of the Street the LHA wishes to receive copy notices for. This depends on local maintenance arrangements. For more details, see Section 13.3.2.
Figure 31 - Boundary along Street centreline
10.3.3.6 Scenario 3 – District boundary along the centreline of a Street
If an SNN Authority (either a District Council or a Unitary Council) administrative boundary runs down the centre of a Street and the adjoining SNN Authority is within the same LHA, only one USRN for that Street must exist within the NSG. The SNN Authorities must agree between themselves which Authority’s USRN is used.
10.3.3.7
The SNN Authority whose USRN is used must do the following:
- Ensure the LHA knows that the USRN is present at GeoPlace.
- Record that a notice is required.
- Record that the Street is a Highway Maintainable at Public Expense (if it is).
- Record which LHA is responsible for the maintenance.
10.3.3.8
The SNN Authority whose USRN is not used must keep the Record locally, using the adjacent SNN Authority’s USRN. The LHA can submit a type 61 Record indicating that copy notices are required.
10.3.3.9 Scenario 4 – LHA boundary along the side of a Street
If an SNN Authority (either a District Council or a Unitary Council) administrative boundary runs along a Street but follows the kerb or frontage of properties, only one LSG must contain a Record for that Street, see Figure 32. The SNN Authority with the majority share of the Street must enter the Street into the LSG with a USRN from the SNN Authority’s range.
Figure 32 - Boundary along one side of Street.
10.3.3.10
If a Local Highway Authority administrative boundary is on the junction of two Streets, then the Authority Street Custodians in both Authorities must work together to ensure that the Street Records remain continuous.
10.3.3.11
If a parish boundary runs down the centre of a Street, and if both parishes are in the same LHA, then only one USRN for that Street must be recorded in the LSG.
10.3.3.12 Scenario 5 – LHA boundary crossing at multiple points along a Street
An LSG must contain ESU and Street Data only for lengths of highway within the Local Highway Authority administrative boundary.
10.3.3.13
If Streets beyond the Local Highway Authority administrative boundary are recorded, this creates duplicates when amalgamated into the NSG.
10.3.3.14
If a Street passes from one Local Highway Authority administrative boundary into another and then back into the first Local Highway Authority, do one of the following things:
- Record two Streets (with different USRNs), one non-contiguous Record for the first Local Highway Authority and one Record for the second.
- If local requirements need the Street to be split into 3, the LHA entering 2 Streets must agree different localities with the SNN Authority to provide a unique entry in the LSG.
10.3.3.15
In such cases, the SNN Authorities must agree the start and end point for each ESU to ensure that they tie together and effectively provide a contiguous network across administrative boundaries, see Figure 33.
Figure 33 - Multiple crossing points
10.3.3.16
If the administrative boundary of an LHA cuts down across or through a Street, as demonstrated in Figure 30, Figure 31, Figure 32 and Figure 33 each LHA must register an interest in their neighbour’s Street to ensure that each organisation receives notices of pending works for coordination purposes. The Interest Record is transferred within the data transfer file as a type 61 Record. For further details see the DTF current version. For details of the current version see Related Documents.