There are long delays on the M4 westbound near Bristol. It was caused by a lorry that overturned between J21 for the M48 and J22 for the M49 at 6.30am this morning. There is congestion right back to J18 for Bath.
Police say removing the overturned lorry has proved to be a "significant challenge". The operation is ongoing.
Meanwhile the Highways Agency is advising motorists to divert via the M48 towards Wales using the original Severn Bridge, although this is also very congested as a result of the extra traffic from the closure.
Two lanes have been closed on the M48 Westbound in Gloucestershire because of an incident near Junction 1 (Aust).
First Severn Crossing: A lane is closed Westbound from 7am for roadworks.
The M48 Severn Bridge Crossing is closed Westbound all weekend for resurfacing between 6am Sat 7th until 11pm Sun 8th July.
Signed diversions are in place.
It closes Eastbound next weekend (Sat 14th - Sun 15th).