A woman in her 20s died after her car was involved in a single-vehicle accident in Swaffham.
It happened on the westbound A47 carriageway just before 8.30am on Monday March 7th.
A road closure was put in place for some time to allow investigations to be carried out.
Officers are appealing for any witnesses or anyone with dashcam footage to come forward. They should contact PC Sharon Taylor in the Serious Collision Investigation Unit on 101 or via email: SCIU@norfolk.pnn.police.uk quoting incident 68 of 7 March 2022.
Alternatively contact Crimestoppers 100% anonymously on 0800 555 111.