Name
Tredegar Park St Mellons
Route
Start point
Junction number at start: 29
Castleton
End point
Junction number at end: 29A
St Mellons
This scheme included the M4 between Tredegar Park and Castleton.
Road scheme and chronology data is courtesy SABRE (where much of it was gathered by member Ross Spur), with additional data from the UK Motorway Archive, the Scottish Roads Archive and the Northern Ireland Roads Site.