The driver from Lewes who died in a collision near Forest Row has been named as 39-year-old James Hunt.
Mr Hunt, of Hillman Close, died after his car left the road and struck a tree on January 10.
His family paid tribute to him, describing him as loyal and loving.
PC Shirley Ross, from Sussex Road Policing unit, said: “James tragically died following a collision and I would like to appeal to anyone who saw his blue BMW 316 on the A22 just south of Forest Row between 11.30pm and midnight on 10 January to contact us.
“The information they give us could help us in our investigation.
“They should contact police on 101 or email email@example.com.”
James’s family said: “As a family we would like to pay tribute to our loving son, brother and uncle, James Hunt. Nothing can ever replace the emptiness we feel as a result of his sudden and tragic death.
“James was born in Scunthorpe but grew up in Lewes. As a child he enjoyed riding his bike but was always falling off, long before the introduction of cycling or skateboard helmets.
“He trained as a chef and enjoyed his work. One of his great pleasures was fishing where he made some memorable catches of some particularly large carp.
“James was very laid back and easy going, he was not always punctual but was loyal and loving.
“James was an integral part of our family and his love, generosity and humour will be missed by us all. He touched many people’s lives in such a positive way and we now hope he is at peace.
“We would like to thank our family and friends for all the kindness they have shown us at this difficult time.
“We have no further comments to add at this time.”