|Location Map ( geo)|
|Via:||Ladywood, Handsworth Wood|
|Distance:||5.4 miles (8.7 km)|
|Meets:||A4040, B4129, B4284, A456, B4532, A4540, B4126, A41, B4144, A4040, B4167, A34|
|Old route now:||A4540|
|Route outline (key)|
The B4124 follows a generally south to north course west and north-west of Birmingham city centre.
Today much of its former central section has been reclassified as part of the A4540; it always had a multiplex along the A41. The two remaining sections – from the A4040 in Harborne to Ladywood, and from Soho Hill to the A34 just north of Hamstead – are, respectively, 2 miles (3.3 km) and 3.4 miles (5.5 km) long.