Ian Owen, 40, of Tyn Rhos, Gaerwen, admitted the charge at Caernarfon Magistrates’ Court today (August 15).
Marc Winston Roberts, from the Amlwch area of Anglesey, died aged 52 on January 20, 2022 following a crash on the Britannia Bridge.
The crash happened shortly before 3am that day, and involved two cars and two heavy goods vehicles.
Owen will be sentenced at Caernarfon Crown Court on Friday, September 8.
An application for unconditional bail was granted by magistrates, who also issued Owen with an interim disqualification from driving until he is sentenced.
Mr Roberts’ family paid tribute to a “fun-loving individual” following his death.
In a statement, his family said: “Marc was a fun-loving individual who loved life and his job as an electrical craftsman.
“Time spent in his company was enjoyed by friends, family and colleagues alike.
“Although his life has been cut tragically short, it was filled with happiness, and he shared a unique bond with his four-legged ‘best mate’, Leo.
“He will be sadly missed by Jane and Gareth, Carys, Sion and Elin and everyone who knew him for his character and sense of humour.
“There was never a dull moment around Marc.”