A19 Northbound closed, queuing traffic due to accident involving six vehicles between A690 Durham Road / B1286 City Way (Herrington Interchange) and A183 Chester Road.
The accident has happened just before the exit slip road at Durham Road, affecting traffic towards the Tyne Tunnel.
Traffic has not been helped by poor weather conditions in the area.
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Sandiford, a former legal secretary originally from Redcar, was convicted of drug smuggling offences and sentenced to death in 2013.
Durham Crown Court heard that one of the male victims suffered a triple-fractured jaw, while left lying in the gutter, unconscious.