Police are appealing for witnesses of the fatal collision on the A14.
Officers were called to reports of an incident on the westbound carriageway at 8.15pm yesterday, 15th January, involving a green Scania lorry with two trailers and a pedestrian between junctions 44 and 43.
The man, aged in his 50s, died at the scene and his next of kin have been informed.
To allow an investigation into the circumstances to take place, the road was closed until 2.30am today, 16th January.
If you saw anything or have dash cam footage, contact police on 101 quoting CAD number 401 of 15th January.