The A507 near Stotfold is blocked this morning after a three-vehicle crash.
And a broken down car and heavy fog are causing long delays on the A1(M).
The A507 collision involved two cars and a van, with emergency services at the scene.
The road – from Norton Road up to Junction 10 of the A1(M) for Stotfold and Baldock Services – is currently blocked both ways.