Rickmansworth High Street will be closed for four weeks so lamp columns and bollards can be painted.
The main road will be shut between Monday, August 4 and Monday, September 1 from 7.30am to 5pm.
The scheduled work will take place in two stages.
The first is between North Way and Station Road, and will run between August 4 and August 20 and the second will be carried out between August 20 and September 1 in Wensum Way to Station Road.
The road will be closed but businesses will remain open.
Workmen will be reconstructing the worn out sections, including bus and parking bays. Lamp columns and bollards will be painted and all road markings refreshed.
A diversion route will be in place.
The work will be carried out by Ringway on behalf of Hertfordshire County Council.