https://en.wikipedia.org/wiki/A48_road
WebThe A48 is a trunk road in Great Britain running from the A40 at Highnam, 3 miles (4.8 km) west of Gloucester, England, to the A40 at Carmarthen, Wales.Before the Severn Bridge opened on 8 September 1966, it was a major route between England and South Wales.For most of its route, it runs almost parallel to the M4 motorway.During times of high winds at …