Highways Agency - Safe roads, Reliable journeys, Informed travellers

A419 COMMONHEAD JUNCTION IMPROVEMENT

4. DESCRIPTION OF SCHEME OPTIONS

4.1 Three options to solve the problems at Commonhead junction have been considered as follows:

• Option A - 'Overpass'
• Option B - 'Underpass'
• Option C - At-grade throughabout

4.2 Option A (Overpass) would add a second level above the existing Commonhead junction for A419 through traffic. The removal of the through traffic would reducecongestion at the roundabout.

4.3 Option B (Underpass) would provide a similar reduction in congestion as Option A (Overpass) but would pass under the existing Commonhead junction.

4.4 Option C (throughabout) would provide a new traffic signal controlled layout at the same level as the existing Commonhead roundabout. This option however would not provide a long term solution to congestion and would provide congestion relief for around only 6 years.

Cost Estimates

4.5 The construction cost estimate for each option is as follows:

Note: These estimates are based on (£ million) 2001/Q1 values.