The following comments are based on the Cost Benefit Analysis for Chesterton Bridge and released under FOI 7177 made by Chris Smith on 14/11/16. The report is dated 6/10/16 conducted by WYG in October 2016. This has not been listed on the council website, but is published here : foi_7177_app1-cost-benefit-report There is also a covering letter (FOI_7177_RESPONSE foi_7177_res-council-response).
The Cost-Benefit Modelling as presented appears to have used incorrect figures and underestimated costs and overestimated benefits.
The model itself appears unsuitable under Treasury Green Book guidance, since no allowance is made for environmental impacts nor for a QRA.
Nevertheless the model – even including the most optimistic parameters and non-economic “health” and “ambience” benefits – still shows the scheme costs far more to build than the benefits ever are – close to 40 to 1 – costs to benefits i.e. spend £40 get £1 back. We think in reality the ratios will be far worse. The benefits for congestion are minimal.
Due to the adverse effects caused by the scheme on the environment and landscape, the scheme would need to demonstrate both sustainability and overriding public benefit to proceed. We do not believe that this is the case, and that the scheme is unsustainably economically and environmentally. Continue reading