National Highways said the work was delayed due to "very challenging ground conditions"
A business boss has called for National Highways to pay £1m to support local traders after delays to a major road scheme.
Work started on the £355m redesign of the A63 in Hull city centre four years ago and was supposed to finish in March.
But National Highways announced on Monday that completion the completion date would now be spring 2026, citing "very challenging ground conditions".
Dr Ian Kelly, chief executive of Hull & Humber Chamber of Commerce, said the highways authority should set aside a £1m fund "to help local businesses survive".
"This terrible news will put Hull's business community under even more pressure, at a time when many are struggling to cope with increased trading costs, " he said.
"We thought after all these years the end was in sight and now we have to endure another 12 months of traffic chaos which deters people from coming into the city centre."
Work started on the Castle Street project in 2020
The Castle Street work started in 2020 and involves lowering the level of the A63 to create an underpass.
Jim Harris, manager of St Stephen's Shopping Centre, said the delay in finishing the scheme was "very disappointing news", according to the Local Democracy Reporting Service.
"City centre businesses have been heavily affected by the Castle Street scheme, and a lot of hard work has been done to mitigate the issues, but we could really do with some financial help if this is going to continue for yet another year."
Listen to highlights from Hull and East Yorkshire on BBC Sounds, watch the latest episode of Look North or tell us about a story you think we should be covering here, external.
Traders worried over impact of A63 roadworks delay
Hull A63 city centre roadworks delayed by a year
Hull & Humber Chamber of Commerce
Local Democracy Reporting Service
National Highways
BYD arrives in Bradford
Drink driver and severely defective vehicle found during two hours of spot checks in Grimsby
Bluetongue virus: Restricted zone extended for farmers after positive tests in Yorkshire
Family name woman, 27, who tragically died in North Lincolnshire crash
Charming photos take you back to Churwell in the 1960s
Dealer caught with £2,000 of drugs two weeks after prison release
Criminology student guilty of murdering woman in beach stabbings
Taxpayers can't fund payouts for Waspi women, Starmer says
100mph laughing gas driver jailed for killing friends
Trouble in Arctic town as polar bears and people face warming world
General's assassination pierces Moscow's air of normality
Gisèle Pelicot: How an ordinary woman shook attitudes to rape in France
Chris McCausland: Blind people don't need inspiring
Chris Mason: The challenge of disruptors with deep pockets
What is the row about women's pensions?
Could this be what our home on Moon or Mars might look like?
Life in Idlib hints at what Syria can expect from rebel rule
Royal Watch: Get the latest royal stories and analysis with Sean Coughlan’s weekly newsletter
A festive fright in the Scottish Highlands
Danny visits the area where two climbers experienced the most terrifying night of their lives in 1974
Your first look at Wallace and Gromit: Vengeance Most Fowl
Wallace invents a 'smart gnome' that has a mind of its own—or does it?
Is violence normal?
Dr Gwen Adshead addresses four questions on violence for The Reith Lectures 2024
How the greatest art works were born of war and bloodshed
Drama documentary of artists Michelangelo, Leonardo and Raphael competing to craft beauty from chaos
© 2024 BBC. The BBC is not responsible for the content of external sites. Read about our approach to external linking.
