Road works are scheduled to take place between Paengaroa and Rotorua on SH33 on Friday.
The works are aimed to improve safety and reduce travel times along the section of the highway.
The road works will be undertaken by Higgins contractors who will realign a series of curves along SH33 approximately half way between Paengaroa and Rotorua.
The series of curves known as the 'Sun Valley Curves' in the Pareteiro area, was a historic crash 'black spot' said the New Zealand Transport Agency's Bay of Plenty state highways manager Brett Gliddon.
The project is estimated to cost $3.6m and was expected to be completed by March 2014 with Rotorua District Council overseeing the works as the NZTA's project partner for the Rotorua area.
Mr Gliddon said the series of curves would be straightened which would benefit users of the road by improving safety, reducing travel times and will make the movement of freight to the Port of Tauranga more efficient. Mr Gliddon said a passing lane will also be installed to enable motorists travelling towards Rotorua from Paengaroa to overtake safely.
During the construction process minor delays could be expected as traffic passed through the construction zone.