What is 1Streetworks?

1Streetworks is an online software service for automatically generating traffic management plans that are compliant with Safety at Street Works and Road Works - A Code of Practice (October 2013), often referred to as “the Red Book”.

The Red Book

The Red Book (and The Traffic Signs Manual, Chapter 8) is a rule book that describes how to lay out signing, lighting, and guarding equipment for street works and road works that are compliant with the rules it describes. 1Streetworks uses a rules engine, which contains a digitalised version of the Red Book rules and logic. It submits some basic information for a plan and the geographical data at that location, accessed live as a service from Ordnance Survey (for example, OS MasterMap® Topography and OS MasterMap® Highways Network, including speed limits) and from GeoPlace, to the rules to evaluate what traffic management plan layout is compliant with the Red Book at that location.

The Traffic Signs Manual, Chapter 8

     Note: All map data is © Crown copyright and database rights 2026 and reproduced under 1Spatial's OS licence 100041549 and should not be copied or distributed.

     Note: Bus timetable data contains public sector information licensed under the Open Government Licence v3.0.

Transport for London bus timetable data is Powered by TfL Open Data.

     Note: English permits are sourced directly from the Department for Transport’s Streetworks Manager open data, and Scottish permits are sourced directly from the Scottish Road Works Register. At this time, there is no central source of Welsh permits.