A new set of traffic lights are set to be installed on Mumby Railway Bridge.
The lights will be at the junction of the B1449 Long Lane and Alford Road between Mumby and Thurlby.
Work is set to begin on Monday, June 12 and it is to be completed on Friday, June 23.
Traffic will be diverted via the A1111 and A52 while the lights are installed.
A highway spokesperson said: “These lights have come to the end of their working life, so it’s essential we go in and get them replaced.
“Not only will the new signals be easier to maintain and cheaper to run, they will also use less energy, cutting our carbon footprint.
“We apologise for any inconvenience caused while the work takes place, and advise motorists to allow additional time for their journeys.”