Motorway cantilever sign
A blue overhead sign suspended over the motorway from a post on the left, showing an upcoming exit and the following text.
Exit destinations: A43; (M40); [Solid square diversion symbol] [Solid circle diversion symbol] [Solid diamond diversion symbol] Oxford; Northampton (W) .
Forward destinations: The NORTH, Birmingham; Leicester M1 .
Junction number: 15A.
The A43 is now a fast dual carriageway through to the M40, and much used by freight traffic making its way north from Southampton to reach the M1, but only really became so in the early 2000s.