Traffic is flowing freely after the new signalised intersection at Te Ngae/Tarawera Rd was switched on this morning.
Waka Kotahi Regional Manager Infrastructure Delivery Jo Wilton said the final line markings and switch over were completed last night.
The temporary roundabout was also removed.
"This upgrade will make the intersection safer, easier to use and more efficient at peak travel times, and it's an exciting milestone for the project," Wilton said.
"We're asking people to take extra care when travelling through the intersection as they get used to the new layout. There may be some delays as people adjust to the change, and the intersection will be closely monitored so adjustments can made to the traffic light phasing if needed."
Wilton said the upgrade had been a big undertaking for the community, with work on the intersection starting in September last year.
"The process to transform the intersection from a roundabout to a signalised intersection has involved careful planning, to allow us to undertake the work while keeping the intersection functional for road users.
"We want to thank everyone for their patience, and the businesses in the area for their cooperation."
A Rotorua Daily Post photographer said traffic was flowing freely at the intersection this morning.
NZTA reminded the community the intersection continued to be an active worksite for the next few weeks as final works were completed, and delays were still expected.
"Contractors will continue working at the intersection for about three weeks as they construct the concrete islands separating traffic travelling in opposite directions," Wilton said.
"There will be occasional lane closures, additional signage, and a 30km/h temporary speed limit in place. Waka Kotahi asks motorists to be patient as we complete these final steps."
The final layer of surfacing will be applied in September when temperatures are warmer to ensure a strong bond between the two layers of surfacing.
The signalising of Tarawera intersection is part of the $17 million Eastern Corridor Stage One project, improving SH30-Te Ngae Rd from Sala St to Iles Rd. The project started in February 2020, and is expected to be completed in late 2021.
The roadworks project has caused huge frustration with motorists who have experienced major traffic delays during peak hours, prompting a flurry of letters to the editor earlier in the year.
The Government has no concerns about the development on state land in Ngongotahā.