9.4.3.1.1
The list of Highway Dedication types in Table 9 groups all Highways into one of 8 types, applied to each ESU.
- Each type defines the Highway Dedication changes over the length of an ESU.
- A Highway Dedication code cannot be present for part of an ESU.
9.4.3.1.2
If the Highway Dedication type splits along a section of Highway, then the ESUs must be split or divided at the point where the Highway Dedication type changes. For example, the Highway Dedication changes from a HIGHWAY_DEDICATION_CODE = 10 - Bridleway to a HIGHWAY_DEDICATION_CODE = 8 - All Vehicles, then a split in the ESU must occur.
9.4.3.1.3
Where a Highway has a differing HD_START_DATE due to the completion of construction and subsequent Highway Dedications at differing dates, the ESUs associated with each length of Highway must be recorded as split ESUs, for further information, see Section 11. This ensures that official Highway Dedication dates are present and recorded.
9.4.3.1.4
There can only be one Highway Dedication type applied to the ESU at any given date or time. DTF8.1 provides for the situation where time, dates, seasonal changes or events require a different Highway Dedication type. These must be present as new Highway Dedication Records.
9.4.3.1.5
It is recognised that such cases are exceptionally unusual and will require investigation of the legal basis to check that it is valid. In most situations, the limitation is created by a Traffic Regulation/Management Order and therefore must not be present in the NSG as a separate Highway Dedication Record.
9.4.3.1.6
For example, if a Street with STATE = 2 – Open, was dedicated to vehicular traffic in the winter but only pedestrians in the summer, then it would have a HIGHWAY_DEDICATION_CODE = 8 - All vehicles, during the winter and HIGHWAY_DEDICATION_CODE = 4 - Pedestrian way or footpath, during the summer.
The types of Periodicity are:
- HD_SEASONAL_START_DATE
- HD_SEASONAL _END_DATE
- HD_START_TIME and
- HD_END_TIME.
When using these Fields, the dates and times must not overlap, but they must abut so that there is no time or date that is not covered. For example, two records could be 00:00 to 12:00 and 12:00 to 00:00 but not 00:00 to 11:59 and 12:00 to 23:59, since the latter leaves two one-minute gaps.