Why Highways England won’t fund A27 upgrade for Chichester
Highways England has said an A27 northern bypass at Chichester would have conflicted with national policy and a full southern upgrade as proposed had ‘technical difficulties’.
The reasons form part of a detailed response sent to Chichester District Council on Friday. Both of the suggested options put forward to Highways England for an A27 upgrade, a mitigated new northern bypass and a full a southern upgrade, were rejected by Highways England last month as not being ‘workable or affordable’.
Highways England estimated the cost of the mitigated northern route ‘in excess’ of £480million and the full southern upgrade at £500million, both of which ‘did not represent value for money’.
It concluded: “Whilst the BABA27 work has indicated a level of consensus is possible, the suggestions that they have put forward for both northern and southern options are undeliverable in our opinion due to their costs and in the case of the northern option, the impact of national policy.”
Leader of Chichester District Council, Tony Dignum, said: “The detailed letter confirms the discussions that we had with Highways England, in December.
“We are still extremely disappointed with the response, but we remain determined to continue to campaign on this issue to ensure that a positive solution is found as an improved A27 is absolutely vital for the whole district.
“I will be meeting with Louise Goldsmith, Leader of West Sussex County Council, and Gillian Keegan on January 25 to discuss and reflect on the letter and talk through what the next steps should be.”
In its response, Highways England says of the Mitigated Northern Option, “Part of the new by-pass and a relocated local road (New Road) would intrude into the South Downs National Park (SDNP) and would also impact on Goodwood Estate.
“The option would also likely require substantial works at the Boxgrove roundabout, probably in the form of grade separation, this work is outside of the original scheme and has not been included in the cost figures below.
“The estimated cost of the Mitigated Northern Option is in excess of £480m. The costs also do not include for mitigation of the construction impacts on Goodwood estate operations or events.
“The mitigation enhancements would not increase the scheme benefits and hence the BCR would be greatly reduced from previous options resulting in a scheme that would not offer value for money.”
The mitigated southern option proposed underpasses at Fishbourne and Stockbridge roundabouts, the desire for all turning movements at all existing junctions, with grade separation at Portfield roundabout, as well as enhanced noise and visual mitigation measures.
“The proposal for underpasses at both Fishbourne and Stockbridge roundabouts would incur considerable build and ongoing maintenance costs due to the ground conditions and high water table requiring pumping both during construction and thereafter for the lifetime of the scheme.
“The suggestion of an underpass at Stockbridge roundabout also incurred the costs of diverting the Chichester Canal which would require land take from the Chichester College sports field for the diverted canal. The construction period for underpasses would be greater than the previously proposed flyovers with associated traffic disruption.
“At Stockbridge and Whyke junctions, to comply with Highways Standards it is not possible to have slip roads facing each other, and likewise between Whyke and Bognor roundabouts. The costed option included for the local road being carried over the A27 at the Whyke junction as in RISI Option 2A.
“The flyover option at Bognor roundabout as per RISl Option 2A is feasible (subject to slip road conflicts with Whyke) and was used for the costing exercise.
“The proposal at Portfield junction for a flyover and all direction slip roads is technically challenging.
“To achieve a suitable alignment at even a reduced speed limit requires a horizontal curve that either passes over (through) the new development on the southern side of the junction or travels over the lake on the northern side for its whole length, both with considerable cost implications.
“The tie in with the existing alignment at the eastern end would also become technically unachievable with the slip roads at Temple bar junction, the mitigation of which has not been detailed or costed.
“The Mitigated Southern Option allowed for considerable noise barriers and landscaping, these are limited given the locality of the road in regard residential and commercial development along the various sections of the by-pass and would be technically challenging and costly.”
The letter concludes, “Whilst the BABA27 work has indicated a level of consensus is possible, the suggestions that they have put forward for both northern and southern options are undeliverable in our opinion due to their costs and in the case of the northern option, the impact of national policy. In light of the above it is clear that both presented options, Mitigated Northern and Mitigated southern, have considerable issues to delivery that cannot at this time be overcome.”
For the full, unredacted text of the letter, visit www. westsussextoday.co.uk