One lane is closed northbound on the M5 between J19 (Portishead) and J18 M49 (Avonmouth). It's causing congestion right back to J20 (Clevedon).
It happened after a caravan became detached from the car towing it. Three lanes have re-opened but lane one remains closed.
More top news
Parents have said they are pulling their children out of school for the day in strike action against the government.
A phone line mix-up has caused chaos in a village - after residents were left with their neighbours's numbers.
Among the cyclists is Andrew Venn whose son Joe has a congenital heart condition and will need hospital treatment all his life.