Cornwall Archaeological Unit was commissioned by WSP|Parsons Brinckerhoff (UK) Ltd on behalf of Highways England to carry out an archaeological watching brief during the digging of 116 Geological Investigation test pits along the 12.9 km route of a proposed upgrade to the A30 between Carland Cross and Chiverton Cross, near Truro, Cornwall. Excavation by the GI team was carried out with an archaeologist in attendance to record any features which are exposed during the ground disturbance. Fieldwork was undertaken between Monday 13th February and Thursday 23rd March 2017, often during wet and windy weather conditions. No archaeological features were revealed during the test pitting stage, however, flint flakes, blades and cores were found at Tregroggan and Ventonteague. These two areas have a high archaeological potential to reveal further evidence for prehistoric activity. However, as the total area excavated was minimal the results should be considered in the light of the desk-based assessment (forthcoming) and the results of future geophysical survey and evaluation trenching.