Ten weeks of roadworks are due to begin on Monday to widen Boultham Park Road in Lincoln.
Motorists travelling east on Valentine Road/Dixon Street will be unable to turn right into Boultham Park Road south for the duration of the works.
Access to and from Boultham Park Road north will be via Coulson Road/Boultham Avenue.
Paul Coathup, assistant director for highways and transportation, said:"Over the next few weeks, we will be widening Boultham Park Road and carrying out other maintenance work such as resurfacing, repainting road markings and upgrading the existing street lighting.
"The work will reduce travel times for motorists, making a significant improvement to traffic flow within the city.
"Subject to weather conditions, the work will start on February 4 and is expected to last for ten weeks, we apologise for any inconvenience caused."