Highways England is urging motorists to try to avoid the area around a fatal crash which has killed "at least four people" on the M5.
There are around five miles of tailbacks, and the advice is to stay away.
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The collision happened near J14 of the M5 earlier this month.
A father from Bristol has been named among the four victims of a "harrowing" crash on the M5 over the weekend.
Police have reopened the M5 after a "horrific" crash on the motorway killed four people over the weekend.