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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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Executive summary
The A43 (T) Silverstone Bypass officially opened on the 18th September 2002, providing an improved route for through traffic using the A43 between Brackley and Towcester, Northamptonshire, as illustrated in the diagram below. The scheme provides a continuous dual carriageway between the M40 and A5. It comprises two sections of new dual carriageway, bypassing the villages of Silverstone and Syresham, as well as widening of all single carriageway sections. "Before" and "After" traffic data for the bypass was collected immediately prior to and after scheme opening in September to monitor the effects of the new scheme. In addition, traffic data from surveys on County roads from Northamptonshire County Council and existing Highways Agency permanent count sites was obtained to evaluate the effects of the opening of the A43 (T) Silverstone Bypass on strategic traffic routeing patterns in the area.
Figure 0.1 - Daily Traffic Flows "Before" and "After" Scheme Opening
The main effects of scheme opening are as follows:
- Daily traffic flows rose from around 28,000 vehicles per day before opening to 30,000 vehicles on A43 (T) Syresham Bypass during the first two weeks of the scheme's official opening, thus an additional 2,000 vehicles have been drawn into the corridor;
- Traffic on the main road in Silverstone dropped from 27,000 to 2,600 vehicles per day (a 90% reduction), while traffic in Syresham village was only 490 vehicles following scheme opening in September, representing a 98% decrease;
- Traffic flows on a County B-road, the B4525 (linking with the A43 (T) Syresham Bypass), have increased by 800 vehicles per day, representing a 30% increase;
- A redistribution of traffic from other routes in the area to the A43 (T) appears to have
- taken place to take advantage of scheme improvements to the A43 strategic route;
- There were traffic flow reductions observed on the A361, A422 and A413 routes in Northamptonshire, which totalled around 1,300 vehicles; and
- Journey time savings of up to 10 minutes are forecast for movements that previously used the old A43 route through the villages of Silverstone and Syresham.
