SpecialDesignationTypeValue

The SpecialDesignation feature has property field ‘designationType’ which has the type allocated from ‘SpecialDesignationTypeValue’. The table below identifies the codes used to populate this field and a description for each code.

‘SpecialDesignationTypeValue’ coverage varies between LHAs and the individual codes. While coverage for statutory designations is good overall, coverage for some may be sporadic and inconsistent.

Code List: SpecialDesignationTypeValue

Designation of highways that are subject to special controls when undertaking street or road works

Code	Description
Protected Street	Statutory designation which restricts the placement of apparatus by a street or road works undertaker.
Special Engineering Difficulty	Statutory designation relating to streets or parts of streets associated with structures, or streets of extraordinary construction.
Traffic Sensitive Street	Statutory designation that restricts street works to be undertaken during period of high traffic.
Lane Rental	Indication that Street is part of a Lane Rental scheme. Section 74A of NRSWA enables highway authorities, with the approval of the Secretary of State, to charge street works undertakers a daily charge for each day during which their works occupy the highway – commonly referred to as “lane rental” schemes.
Event Information	Indication that this Street has an event planned.
Drainage And Flood Risk	Optional designation that provides details of areas that are susceptible to drainage and flood risk.
Emergency Services Routes	Optional designation that alerts the Works Promoter if there is a need to keep the emergency services informed of proposed works and progress
Environmentally Sensitive Areas	Optional designation that identifies information about the local environment. This includes environmentally sensitive areas, such as sites of specific scientific interest and ancient monuments, or specially cultivated areas containing shrubs, plants or bulbs which shall be reinstated using the same or similar species.
HGV Approved Routes	Optional designation that allows Works Promoters to consider the impact on HGVs of restricted traffic flow or alerts the Works Promoter that wide vehicles are commonplace.
Level Crossing Safety Zone	Optional designation and mainly created by a Railway Operator. It identifies an area around a level crossing where, if occupied to carry out works, there is a risk of traffic obstructing the crossing.
Local Considerations	Optional designation that should be used to inform the Works Promoter of any special schemes that may impact working, for example, noise levels.
Parking Bays And Restrictions	Optional designation that provides details of streets with parking meters, residents parking bays and parking restrictions such as yellow lines, red routes, and other permanent parking restrictions.
Pedestrian Crossings, Traffic Signals And Traffic Sensors	Optional designation that captures streets that have signalled controlled pedestrian crossings and permanent traffic signals or any Traffic Sensors in the highway.
Pipelines And Specialist Cables	Optional designation that is created by the Local Highway Authority on behalf of the private sector oil or gas pipeline owner. This designation should be treated as a reminder to consult further, not as an absolute indicator of the nature of the pipeline or cable.
Priority Lanes	Optional designation that allows the Local Highway Authority to identify the location of bus lanes, and Cycle Routes in the street.
Proposed Special Engineering Difficulty	Optional designation used to identify new streets or assets of extraordinary construction. One typical use is to identify the location of a designation during any consultation period. On conclusion of the consultation period this feature will typically become a ‘Special Engineering Difficulty’.
Special Event	Optional designation that provides early awareness of special events to Work Promoters to enable them to consider any actions that they may need to take to avoid any works taking place on the street during the time(s) of the Special Event.
Speed Limits	Optional designation that provides information about the speed limit applicable for the street. Only speed limits (signed or as per the legal order) over 40mph are recorded as standard with some LHAs providing 30mph speed limits as well. This data is intended to be used for planning of traffic management and works safety measures.
Strategic Route	Optional designation that is used by Local Highway Authorities to identify Strategic Routes, such as the Primary Route Network. Strategic Routes are identified by the Highways Agency, TfL in London and the South Wales Trunk Road Agent (SWTRA) and North & Mid Wales Trunk Road Agent (NMWTRA) in Wales.
Street Lighting	Optional designation that helps Works Promoters to carry out works in the evenings and at nights by providing relevant information about Street lighting. It is particularly useful for when Part night lighting where a council has a policy of turning lights off during specific hours.
Streets Subject To Early Notification Of Immediate Activities	Optional designation that enables street authorities to designate streets that are particularly vulnerable to traffic. Work Promoters are required to provide early warning of activities to the authority immediately after the activity has commenced.
Structures	Optional designation used by asset owners to identify the existence of a structure that has not been designated as an SED. In cases where this identifies a Bridge, Works Promoters should regard it as a reminder that under Section 88 they must consult the Bridge Authority prior to serving Notices.
Transport Authority Critical Apparatus	Optional designation that provides details of transport authority apparatus critical to operations of that authority which if damaged or if interrupted could disrupt or temporarily stop services (for example, HV cables to a rail network).
Unusual Traffic Layout	Optional designation that provides details of where the layout of existing traffic signs, road markings, studs or verge markers is not in accordance with the Traffic Signs Manual.
Winter Maintenance Route	Optional designation that helps determine the relative importance a route is given by a Local Highway Authority for clearing and treatment during the winter months.