The section, carrying 50,000 vehicles per day, includes a bridge over the Cherwell Valley railway line and Hinksey Stream.

The bridge is in need of replacement which is expected to cost £90 million with work starting in 2023 and completion in 2026.

[1] The replacement will include work for the Oxford Flood Alleviation Scheme, a bus lane and improvements in pedestrian and cyclist facilities.

[2] Its original route when first classified in 1922 was from Tamworth in Staffordshire to Oxford,[3] terminating at Two Gates on the old A5.

On this stretch of road, heading eastbound, drivers will notice the distance sign showing the name A423 and its original final destination of Maidenhead.