Associated Street Data (ASD) forms part of the National Street Gazetteer (NSG) and contains a wealth of addition information related to streets.  The Associated Street Data contains information such as the ownership of the street, streets with special surfaces, height and weight restrictions, traffic sensitive streets and much more.  Associated Street Data significantly increases the scope of the National Street Gazetteer by allowing those using it to have all the information about any particular street easily available.

As with the NSG, all Associated Street Data complies with BS7666.

Associated Street Data (ASD) is an additional module with Symphony iManage Gazetteer Management System.