Police are renewing their appeal for witnesses following a fatal collision on the M5 northbound near Cullompton on Tuesday.
Police and other emergency services were called to the scene of the fatal collision involving a car and a lorry just after 12.10pm.
The collision involving a heavy goods vehicle and a silver Vauxhall Omega happened about one mile before junction 28, Cullompton.
The car driver, a 58-year-old woman from Tiverton, was pronounced dead at the scene. The male car passenger was not injured.
Investigating officers would like to hear from anyone who was travelling in the southbound carriageway of the M5 in the opposite direction, and who may have witnessed the collision.
The lorry driver, a 64-year-old man from Cardiff, was arrested on suspicion of death by dangerous driving.
Anyone who witnessed the collision is asked to call police on 101 quoting reference 265 of 27th January.