Called Old Oxford Road on the OS map, that is indeed what it was before a re-alignment of the A40, but the street name is Old Dashwood Hill, named after the Dashwood family of nearby West Wycombe House.
Uploaded to Geograph by Des Blenkinsopp on 19 September 2013
Photo © Des Blenkinsopp, 19 September 2013.
Licensed for reuse under this Creative Commons licence