The victim was working on the night-shift when the accident happened in the early hours of Friday morning.
Buckingham Group is main contractor on the Runnymede roundabout improvement project and the victim was employed by surfacing subcontractor Toppesfield.
A Buckingham Group Spokesman said: ‘‘It is with immense sadness and regret that we must confirm that a fatal accident took place during a night-shift at our Runnymede Roundabout project in the early hours of 1st June 2018.
“The accident is being investigated by the police, our directors and HSEQ Team, and the specialist surfacing contractors, Toppesfield Ltd.
“The Health and Safety Executive has been fully notified of the circumstances.
“The company’s primary concerns and considerations at this stage are for the welfare and interests of the deceased person’s family and all work colleagues involved, and no further details can be provided at this time.’’
Surrey Police said: “Officers, and paramedics from the ambulance service, were called at around 12.50 this morning (1 June) to reports that a man had been injured in a collision with plant machinery at the site.
“Sadly he passed away at the scene. His next of kin have been informed.”
Buckingham has been working on the project for Surrey County Council since July 2017 with work due to be completed this summer.