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Traffic Impact Study
Executive Summary
The A10 Wadesmill, High Cross and Colliers End Bypass opened on 8th October 2004. The trunk road scheme provides an alternative route for traffic travelling through the villages of Wadesmill, High Cross and Colliers End on the A10 route between Ware and Puckeridge in Hertfordshire. 'Before' and 'After' traffic data was collected before and immediately after opening to evaluate the effects of the bypass on the surrounding area.
Figure 1.0 - Weekday traffic flows 'before' and 'after' scheme opening (JPG 222KB)
The main effects of the scheme opening are as follows:
- The bypass carried around 23,000 vehicles per day after opening in November 2004 and there are significantly reduced daily traffic volumes on the bypassed section of the A10 between Ware and the A10/A120 roundabout, clearly indicating that the scheme has been successful in routing approximately 21,000 vehicles away from the old A10; which represents an 80-85% reduction in traffic levels through the three villages;
- Traffic on the A120, North of the scheme, has increased by 2,200 vpd since the opening of the bypass. Evidence from traffic counts strongly suggests that this is due to long distance strategic re-routing, as the bypass is now more appealing compared to the old A10;
- Traffic on local roads on the bypassed section of the A10 have also been reduced, with the most significant impacts on Anchor Lane and Cold Christmas Lane, which have had reductions in traffic of 1,900 vpd (36%) and 650 vpd (62%) respectively. The reduction on Anchor Lane is assumed to be due to traffic re-routing onto Westmill Road (A602) to join onto the bypass;
- The proportion of HGV's through the villages has decreased from 8-10% to 4-5%, indicating that the bypass has clearly been successful in re-routing HGV's out of these villages; and
- Journey time data suggests that time savings of around 2 minutes is being observed for journeys from the A10/A120 Standon Hill roundabout to the A10/A1170. The exception is for Soundbound trips in the PM peak where savings of 6 minutes are being observed.
