Click to view any of the documents below, most of which we have had a part in authoring or publishing or are implemented in our software.

They are PDF files under 1 Mb unless stated otherwise. They are either hosted here or are links to the organisations that publish them.  

IHE Sign Structures Guide 2021 (3 Mb)
edited and co-authored by Buchanan Computing

ARTSM Guidance on specifying permanent signs
co-authored by Buchanan Computing 

DfT Operational Guidance-Parking Policy & Enforcement 2015
withdrawn 2018 but most advice (e.g. Appendix E on the TRO process) is still correct and useful. 


The following are installation programs for software that we supply free of charge. They require you to login with your email address, which we will use only to tell you about any updates.

SignPlot Sign Illumination Tool
For TSRGD 2016. Answers that tricky question: Does this sign legally need lighting or reflectorisation?
New: version 1.10 covers the 2022 Scottish Amendment for LEZ signs, etc.

SignLoad Designer
Steel support design for traffic signs to BS EN 12899-1:2007.
Checks also for passive safety to BS EN 12767:2019.
New: version 3.4 covers multiple signs on the same structure.


These graphics are the result of our work for Tranport Scotland on their amendment TSRGD that comes into force on 23 May 2022. You need to log-on to download them, but a guest registration is available to anyone (see panel, right). SignPlot users may alteratively download them from our User Area.

Sign graphics for Traffic Signs Amendment (Scotland) Regulations 2022:
SignPlot format or DXF format