One of three workmen, who was injured in a collision on the A361 in Tiverton on Tuesday January 29, has died.
The man has been identified as Steven Tolley, 48, from Tiverton.
Mr Tolley was critically injured in the collision and died in Derriford Hospital last night.
Next of kin have been informed.
Police and the Health and Safety Executive are conducting an investigation into the collision.
Officers have renewed their appeal for witnesses to the collision which happened on the northbound carriageway close to Gornhay Cross at 11am.
They would particularly like to speak to those who saw the Iveco van in the area at the time or how and where the men were working in the road.
Witnesses are urged to contact MPC Chris Wright at Exeter Serious Collisions Investigation Unit by calling 101, quoting log number 208 29/01/13.