- A4123 between A4150 and A459 roundabout, Wolverhampton (Grid ref SO915980)
- A4123 between A4123 Birmingham Road meets grove street and A4123 slip road into A4150, Wolverhampton (Grid ref SO915979)
- A4123 between A459 roundabout and A4039, Wolverhampton (Grid ref SO920970)
- A4123 between A4039 and A4126, Wolverhampton (Grid ref SO924960)
- A4123 between A4126 and A463, Wolverhampton (Grid ref SO933951)
- A4123 between A463 and Wolverhampton boundary, Wolverhampton (Grid ref SO936947)
- A4123 between A463 and A457, Dudley (Grid ref SO940937)
- A4123 between A457 and A4168, Dudley (Grid ref SO942924)
- A4123 between A4168 and A4037, Dudley (Grid ref SO950917)
- A4123 between A4037 and A461, Dudley (Grid ref SO956910)
- A4123 between A461 and A4034, Sandwell (Grid ref SO960905)
- A4123 between A4034 and M5, Sandwell (Grid ref SO986883)
- A4123 between A4034 and B4169, Sandwell (Grid ref SO987880)
- A4123 between B4169 and A456, Sandwell (Grid ref SP000861)
- A4123 between A456 and A4040, Birmingham (Grid ref SP011850)