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.
STRO5422-GissingRd-EmergencyNotice – Junction of Gissing Road, Station Road and Crown Green in Burston. Traffic lights for Anglia Water repairs.
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.