Downer EDI (ASX:DOW, NZE:DOW) has been named the preferred contractor to manage maintenance on four New Zealand Transport Agency state highway contracts, according to a Friday filing with the Australian and New Zealand bourses.

The company will deliver maintenance and operations services on state highway networks in Central Waikato and Coastal Otago for 10 years each, and in Taranaki and Tairawhiti for three years each, the filing said.

The company estimates the Taranaki, Tairawhiti, and first five years of Central Waikato and Coastal Otago contracts will generate around NZ$870 million, per the filing.

The scope includes routine and non-routine inspections, pavement and surfacing renewals, drainage and environmental maintenance, traffic services support, structure maintenance, and emergency response, the filing added.

The work is expected to start in May 2026, pending final contract agreements.