Collection M4 corridor around Newport: associated reporting We have produced a number of reports to inform decision making on the project. Part of: Previous road improvement projects First published: 27 September 2017 Last updated: 27 September 2017 Associated reporting M4 corridor around Newport: revised economic appraisal report 1 December 2016 Report M4 corridor around Newport: revised wider economic impact assessment report 1 December 2016 Impact assessment M4 corridor around Newport: appraisal of objectors’ alternative blue route proposals 1 December 2016 Report M4 corridor around Newport: updated public transport overview report 1 December 2016 Report M4 corridor around Newport: scheme assessment report 1 March 2016 Report M4 corridor around Newport: sustainable development report 1 March 2016 Report M4 corridor around Newport: economic appraisal report 1 March 2016 Report M4 corridor around Newport: wider economic impact assessment report 1 March 2016 Impact assessment M4 corridor around Newport: non-motorised user context report 1 March 2016 Report M4 corridor around Newport: traffic forecasting report 1 March 2016 Report M4 corridor around Newport: local model validation report 28 November 2015 Report