Of all the aspects of civil engineering that involve geotechnical engineers, arguably the largest is that associated with transport infrastructure. The geotechnical engineering associated with infrastructure covers all facets of the profession, from assessment, interpretation and management of potential geotechnical problems, to the development and use of state-of-the-art construction or design techniques to optimise value for money. All of this work is preformed within the changing environment of the politics, standards, funding and management of the infrastructure