The extension of Fitzherbert Ave in Whanganui is taking longer than anticipated and will not be completed this month as planned.
Whanganui District Council senior roading engineer Brent Holmes confirmed that the timeline had been extended.
"The Fitzherbert Ave extension will not be completed by June 30," Holmes said.
"The work programme will be updated next week and we will be able to provide more information, including a timeline for finishing, then."
Work began in November to extend Fitzherbert Ave to Mosston Rd, enabling the residential expansion of Springvale and the industrial development on Mill Rd.