Noise levels on all four sections were assessed to establish whether they met the Hansard sift criteria published on 11 November 1999. None met the criteria for further investigation.
An assessment of the noise levels on the M27 between Junctions 11 and 12 was carried out in 2006 as part of the Environmental Statement for the scheme to construct a climbing lane in each direction between junction 11 (Fareham) and junction 12 (Portsmouth). That assessment concluded overall noise levels would reduce slightly in the opening year as a result of using low noise surfacing.