Manual for Development of Documents

The Manual for Development of Documents (MDD) is published by National Highways to give procedures, processes, instruction and advice for the development of documents relating to the planning, preparation, design, construction, management and demolition of highway works on the UK Overseeing Organisations’ motorway and all-purpose trunk roads.

The documents referred to in the Manual are collectively called requirements and advice documents (RADs). The Manual is made up of three parts:

MDD Part 1 – Governance of document development

MDD Part 2 – Document layout and style

MDD Part 3 – Drafting rules