 The junction would also have had a connection westwards to a feeder motorway to the planned terminus of the M3 motorway and the actual terminus of the M4 motorway at Gunnersbury.It is possible that this motorway would have been designated as a continuation of the M4.Heading east the SCR would have followed the route of the National Rail main line to Waterloo station crossing the tracks south-west of Queenstown Road station.