|To:||Slattocks Interchange (SD894086)|
|Distance:||0.6 miles (1 km)|
|Now part of:||A627(M)|
|Route outline (key)|
The A6138(M) is a maybe motorway number, not marked on any signpost or any map but one, which may be either a mistake by the map makers or a trap road number for copyright protection. It applies to the spur of the A627(M) from its J2 west to the A664, which is signed in both directions as the A627(M).
It should be noted that the A6138 number seems to have never been allocated, although the surrounding numbers are allocated within a similar area.