The Highways Agency reviews its trunk road schemes, one year and five years after they open, to assess how accurate original forecasts were.
These reviews have shown that forecasts are wrong and forecasting is not being improved. The Agency’s forecasts underestimate the effect on traffic, air quality, noise and greenhouse gas emissions. They also fail to predict the economic impact and whether schemes will be good value
Until the Highways Agency makes some major changes, spending on new roads will remain a very expensive gamble.
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