The A10 between Cambridge and Ely is a busy stretch of single carriageway road, which is largely unimproved, save for a late 20th Century bypass of Milton. In the early 2000s, the road was detrunked, becoming the responsibility of Cambridgeshire Council, although it was later added to the Main Roads Network.
With the expansion of the business and science parks to the north of Cambridge, as well as significant new housing development in Cambridge and Ely, traffic volumes on the road have increased substantially over recent decades, with worsening congestion. The large amount of goods traffic that uses the road, coupled with the lack of facilities for non motorised users also is a barrier to modal shift.
Over the years there have been several proposals to improve the road between Cambridge and Ely.
Following the outcome of a 2018 report into growth in the area, it was recommended that a scheme was developed to improve safety, journey times, and growth. In 2020, the Cambridgeshire and Peterborough Combined Authority ran a consultation that proposed seven options: