HC Deb 27 July 1978 vol 954 c935W
Mr. Wigley

asked the Secretary of State for Wales how many miles of motorway there are in each of the eight counties of Wales, respectively.

Mr. Barry Jones

There is one motorway in Wales—the M4. It traverses five counties, as follows:

County Mileage
Gwent 23.2
South Glamorgan 5.6
Mid Glamorgan 10.1
West Glamorgan 16.6
Dyfed 3.1