Suffolk Police are appealing for witnesses who saw the crash this morning, or maybe have dashcam footage, to come forward to help the investigation.
A statement from the force says: “The A14 remains closed westbound between Junction 58 at Seven Hills and Junction 56 at Wherstead; and eastbound between the off-slip and the on-slip at Junction 57 for Ransomes Europark.
“These closures are expected to remain in place into this evening and so motorists are advised to plan their journeys accordingly. Diversions are in place.
“Officers are appealing for any witnesses and asking any motorists driving in the area at the time of the incident with a dashcam fitted in their vehicle, to review the footage for any material that may be of assistance. Anyone with information is asked to contact the Joint Norfolk & Suffolk Serious Collision Investigation Unit, quoting reference: 37/23817/26.”