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The Project Control Framework
On 1st April 2008 we launched the Project Control Framework. The Framework sets out how we, together with the Department for Transport, manage and deliver major improvement projects.
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A428 Caxton Common to Hardwick Improvement
5.0 Traffic Flows
5.1 Before any highway improvement is provided traffic studies are undertaken to help determine the impact of the proposals across a range of operational environmental and economic criteria. A scheme-specific computer based traffic model has been developed for the scheme based on the Cambridge to Huntingdon Multi Modal Study (CHUMMS). The CHUMMS model has been enhanced to include more detail in areas specific to the A428 Scheme, and updated and recalibrated with traffic count data collected specifically for the Scheme assessment. The objective of the model is to provide estimates of traffic flows at and between junctions. This enables an economic appraisal of the Scheme to be undertaken and appropriate junctions and carriageways to be designed.
5.2 As a result of concerns raised in a number of objection letters about the level of additional traffic that would be generated on the local road through Dry Drayton, additional traffic surveys have recently been undertaken. These surveys have been used to provide both additional validation for aspects of the forecasting already undertaken and also to respond in detail to the concerns raised.
5.3 The traffic forecasts have been made for 2006, the assumed opening year of the Scheme and 2021, the design year, which is taken as 15 years after the assumed opening year. Predicted traffic flows for 2006 and 2021 are shown on Figures 2A and 2B. Traffic model development will be described in more detail in Mr Black's evidence on Traffic and Economics.
