From Roader's Digest: The SABRE Wiki
|Length:||5.2 miles (8.4 km)|
|Meets:||A4148, B4149, A4041, A41, A4182, A457|
|Walsall • West Bromwich •|
|Route outline (key)|
In the original 1922 road numbering, A4031 was allocated only to the section between the A41 at West Bromwich and the A457 near Smethwick; with the road between West Bromwich and Walsall being allocated the number B4165. The entire route was upgraded early on, as the 1932 Ten Mile Map shows the entire route as A-class.
Walsall and West Bromwich have since been bypassed, curtailing the A4031 in the first case and rerouting it in the second.