The A194(M), a short spur from the A1(M) south of Gateshead towards the A19 Tyne Tunnel, is a casualty of the A1's continually shifting course in the north east.
Today two motorways cross the Severn near Chepstow. But as recently as 1965, the only crossing was a ferry that carried six cars at a time, from Aust to Beachley.