National Street Gazetteer

The NSG is the authoritative reference dataset of streets within England and Wales used for street works, highways maintenance and traffic management. In line with British Standard 7666(2006) the NSG is regularly updated by all 175 highway authorities with Additional Street Data (ASD) such as road centre lines, ownership details, level of reinstatement required, height weight and width restrictions and direction of travel.NSG是英格兰和威尔士境内用于道路施工作业、公路养护及交通管理的权威街道参考数据集。 依据英国标准BS 7666(2006)，英格兰和威尔士的全部175家公路管理机构会定期更新NSG，并补充街道附加数据（Additional Street Data，ASD），涵盖道路中心线、权属信息、所需修复等级、限高限重限宽标准以及通行方向。