Summary

The published Report (LR403) reviews sources of information on ground conditions in Britain, and points out some of the road-engineering applications to which they may be put. Sources include geological, soil, land-use, topographical and hydrographic maps and publications, mine records, information obtainable from official bodies and local engineering works, air photographs, and site inspection. The availability of these sources of information and their interpretation and application to site investigations for roads are described.

The information that they provide can be useful at all stages of planning, design, construction and service, but is likely to be of most value if obtained at an early stage in the planning of a road project. Information is particularly important for route location and the early recognition of situations offering particular engineering difficulties, and for the planning and interpretation of the detailed site investigation.

The information is available at low cost compared with that obtained by direct subsurface exploration, and at an earlier date, and its use can allow more economical site investigations to be planned.

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