It will be a while yet before traffic can move freely along Whanganui's Wilson St near Taupō Quay.
Whanganui District Council is upgrading the inground services, sewers and water mains in Wilson St between Taupō Quay and Maria Place.
Existing inground services are currently unserviceable and will be replaced, along with the existing sanitary sewer, which is also not serviceable due to broken pipes and joints full of tree roots.
The work will allow for the upgrade of the existing roadway in the lower block, which needs high maintenance and provides a surface for the Cemetery Circuit motorcycle races.
The council said the work was required due to failures of the ageing Wilson St infrastructure, which is around 130 years old.