The other section of the A423 is part of the Oxford Ring Road between the A34 Hinksey Hill interchange and the A4142/A4074 Heyford Hill roundabout, a distance of . The section, carrying 50,000 vehicles per day, includes a bridge over the Cherwell Valley railway line and Hinksey Stream.
The remaining section of A423 is part of the Oxford Ring Road from the A34 Hinksey Hill interchange to the A4142/A4074 Heyford Hill roundabout, spanning a distance. This segment handles 50,000 vehicles per day and features a bridge over the Cherwell Valley railway line and Hinksey Stream.