These are issued by Norfolk County Council and listed on the Highways part of their website as Public Information Notices here https://www.norfolk.gov.uk/roads-and-transport/roads/traffic-orders-notices-and-restrictions/public-information-notices
Notices with maps are posted when appropriate in the Parish notice boards for any closures affecting Burston, Shimpling, Mill Green and Audley End.
STRO3867-BurstonAudleyEnd – Norfolk County Council has made a Temporary Traffic Order affecting the C341 Audley End/Burston Road from a point 10 metres either side of the bridge in the PARISHES OF BURSTON AND SCOLE because of bridge repair works.
The road will be temporarily closed (except for access) from 10th August 2020 to 21st August 2020 for the duration of the works, expected to be 12 days within the period.
For other road information around the UK there is a useful map here Roadworks, diversions and accidents on the one.network web site; zoom in to Norfolk for more local details.