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Revision 0, published: Feb-2020  \nDesign Manual for Roads and Bridges  \nGeneral Principles and Scheme Governance General information  \nGG 184  \nSpecification for the use of Computer Aided Design  \n(formerly IAN 184/16)  \nRevision 0  \nSummary  \nThis document contains specifications for the use of Computer Aided Design (CAD) . It defines methods for managing the production, distribution and quality of construction information using CAD systems, through a disciplined process for collaboration and a specified naming convention.  \nApplication by Overseeing Organisations  \nAny specific requirements for Overseeing Organisations alternative or supplementary to those given in this document are given in National Application Annexes to this document.  \nFeedback and Enquiries  \nUsers of this document are encouraged to raise any enquiries and/or provide feedback on the content and usage of this document to the dedicated Highways England team. The email address for all enquiries and feedback is: [Standards_Enquiries@highwaysengland.co.uk](Standards_Enquiries@highwaysengland.co.uk)  \nThis is a controlled document.  \nDownloaded from on 2 GG 184[https://www.standardsforhighways.co.uk](https://www.standardsforhighways.co.uk) 8-Oct-2026, Revision 0, published: Feb-2020  \nContents  \nRelease notes 3  \nForeword 4  \nPublishing information ................................................ 4  \nContractual and legal considerations ........................................ 4  \nIntroduction 5  \nBackground ...................................................... 5  \nAssumptions made in the preparation of this document ............................. 5  \nAbbreviations 6  \nTerms and definitions 7  \n1. Scope 8  \nAspects covered ................................................... 8  \nImplementation .................................................... 8  \nUse of GG 101 .................................................... 8  \n2. Information container and metadata 9  \nInformation container and model .......................................... 9  \nDelimiters .................................................... 9  \nFile extension .................................................. 10  \nMetadata ....................................................... 10  \n3. Information exchange 11  \nTransmittal ...................................................... 11  \n4. Model and drawing files 12  \nIntroduction ...................................................... 12  \nNamed containers (file names) ........................................... 12  \nClassification (layer names) ............................................. 12  \nUnique identification of assets ........................................... 13  \nStandard component names ............................................ 13  \nAsset information requirements ........................................... 14  \nModelling rules and principles ............................................ 14  \nCAD composition and presentation rules and guidance ............................. 15  \nDrawing frame and title blocks ........................................ 15  \nScales ...................................................... 16  \nRevision and cloud marks ........................................... 17  \nText ....................................................... 17  \nDimensions and leaders ............................................ 17  \nLine types .................................................... 18  \nLine weights and colours ........................................... 19  \nHatching and shading ............................................. 19  \nBackground mapping and copyright ........................................ 20  \n5. Associated data 21  \n6. Survey data 22  \nSurvey specifications ................................................ 22  \nTopographic survey data ............................................... 22  \n7. Coordinate ","cbCaiuLbWBYWxrO9","https://ap.wps.com/l/cbCaiuLbWBYWxrO9","pdf",630793,75,"English","# Release notes\n# Foreword\n## Publishing information\n## Contractual and legal considerations\n# Introduction\n## Background\n## Assumptions made in the preparation of this document\n## Abbreviations\n## Terms and definitions\n# 1. Scope\n## Aspects covered\n## Implementation\n## Use of GG 101\n# 2. Information container and metadata\n## Information container and model\n## Delimiters\n## File extension\n## Metadata\n# 3. Information exchange\n## Transmittal\n# 4. Model and drawing files\n## Introduction\n## Named containers (file names)\n## Classification (layer names)\n## Unique identification of assets\n## Standard component names\n## Asset information requirements\n## Modelling rules and principles\n## CAD composition and presentation rules and guidance\n## Drawing frame and title blocks\n## Scales\n## Revision and cloud marks\n## Text\n## Dimensions and leaders\n## Line types\n## Line weights and colours\n## Hatching and shading\n## Background mapping and copyright\n# 5. Associated data\n# 6. Survey data\n## Survey specifications\n## Topographic survey data\n# 7. Coordinate systems\n# 8. Normative references\n# 9. Informative references\n# Appendix A. Volume codes\n# Appendix B. Location code guidance\n# Appendix C. Type codes\n# Appendix D. Role codes\n# Appendix E. File formats","[{\"question\":\"What does GG 184 specify for CAD usage?\",\"answer\":\"It specifies methods for managing the production, distribution, and quality of construction information using CAD systems, including a disciplined collaboration process and a specified naming convention.\"},{\"question\":\"How are CAD information exchange and metadata handled?\",\"answer\":\"The document defines information container and metadata structures, including delimiters, file extensions, and metadata, and it covers transmittal for information exchange.\"},{\"question\":\"Which areas of model and drawing files does GG 184 cover?\",\"answer\":\"It covers named containers (file names), classification via layer names, unique asset identification, standard component names, modelling rules, drafting composition and presentation rules, and drawing conventions such as frames, title blocks, scales, revisions, text, dimensions, and line standards.\"}]","GG 184 - Specification for the use of Computer Aided Design - Revision 0 | PDF",189]