Upgrades will begin on the New England Highway, north of Glen Innes at Ten Mile Hill, from Monday next week.
The stretch sees almost 2500 vehicles each day.
Upgrades will include the installation of wider shoulders and safety barriers, vegetation clearing, road rehabilitation and surface improvements, along with the reinstatement of Audio Tactile Line Marking (ATLM).
“The New England Highway provides an important link in our road network,” said Transport for NSW Regional Director North Anna Zycki.
“These improvements will ensure safer and smoother journeys for all road users.
“Safety along this section of the highway will also be improved by the reinstatement of Audio Tactile Line Marking (ATLM).
Work on the project will begin on Monday December 4 and will be carried out from 6.30am to 6pm on weekdays and Saturdays.
Traffic control, single lane closures and a reduced speed limit of 40km/h will be in place during work hours, which may affect travel times.
Work on the project is expected to be completed by February, weather permitting.