Overview

• Damaged overhead power cables forced the full closure of the M4 between junctions 18 and 19 in South Gloucestershire.
• National Grid engineers completed emergency overhead line repairs overnight, and National Highways traffic officers deployed signed diversion routes along the A46, A432 and A4174.
• The motorway reopened around 8:54 pm on July 3 after engineers cleared the damaged cables.
• Westbound motorists followed solid circle signs via Bath-bound regional roads while eastbound drivers used the reverse solid square route.
• Significant congestion remains on both eastbound and westbound carriageways as traffic gradually returns to normal.