Papers were presented in session 5 as follows: The effect of unstable terrain and old coal workings on the choice of the route for the proposed Chapel-en-le-Frith and Wheley Bridge by-pass (Buist, DS and Naylor, RA); Some footwall failure modes in south Wales opencast workings (Walton, G and Coates, H); HIllside stabilisation using rock anchors at Grimwith reservoir (Lovenbury, HT, Robinson, BN and McClenahan, MRC); Measurement of structural and ground movement (Ball, R and Lewis, CP); The field measurement of transmission of vibration from railway traffic (Duncan, W); Effect of paraseismic vibrations on buildings (Ciesielski, R); Interface behaviour in a dynamic soil/structure interaction problem (Prater, EG); Slope stability under earthquake loading (Prater, EG); Seismic response of tunnels (Joshi, VH and Emergy, JJ). Discussion on these papers is included. (TRRL)