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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:
| Option A | Option B | Option C |
|---|---|---|
| 10.5 | 16.5 | 5.0 |
Note: These estimates are based on (£ million) 2001/Q1 values.
