Three months of overnight closures on A49 in Shropshire
Stretches of the A49 between Ludlow and Shrewsbury, in Shropshire, are set to close at night for three months.
The first closure, from 20:00 to 06:00 BST, begins later and the section will remain shut at night until Tuesday.
National Highways said work would take place to improve signs and road markings at bends and junctions.
Different sections will be shut at varying times until January 2022, the organisation said, and it urged drivers to check online for more details.