15.3.3.1
CONSTRUCTION_TYPE = 2 – Special Surface should be present in the NSG to indicate that there is a special surface on the Street.
15.3.3.2
This is a discretionary code that identifies areas of the Street where special surfacing materials were used, for example:
- Porous Asphalt.
- High Friction Surfacing.
- Coloured Surfacing.
- Modular Surfacing.
- Other Asphalt Areas (Footways [including mastic asphalt]).
- Replacement Modules.
15.3.3.3
It can also be present in the NSG to indicate that the Highway Authority has a policy in place to reuse damaged modules.
15.3.3.4
If CONSTRUCTION_TYPE = 2 is present, text in the CONSTRUCTION_DESCRIPTION Field must also be present in the NSG to identify the nature of the special surface and if a specialist material is used, details of where this can be obtained.
15.3.3.5
Special surface information must not be present in the NSG for Streets that are maintained by the Regional/National Highway Authority.
15.3.3.6
Special surface information can be present in the NSG for Private Streets where a request has been received from the Private Street Manager. The SWA_ORG_REF_CONSULTANT and the DISTRICT_REF_CONSULTANT should also be present.