National Highways has urged the motorists to “re-route” their journeys in case the closure impacts them.
It mentioned: “If this closure impacts on your planned route, please allow extra journey time. Plan ahead, you may wish to re-route or even delay your journey.
“Further data is offered from National Highways by visiting our www.trafficengland.com web site and journey apps, or by way of our regional X feed. Our 24/7 contact centre staff can be obtainable to offer as much as the minute data on 0300 123 5000.”
https://www.express.co.uk/news/uk/2200485/m4-traffic-live-closure-delays-bath-chippenham