Chris Hutt was praised for his work to develop the Bath-Bristol rail path
Cyclists are paying tribute to Chris Hutt, one of the driving forces behind moves to make Bristol a cycling city, who died at the weekend, aged 59.
Mr Hutt spent 30 years campaigning for a better deal for cyclists and helped to design the Bath-Bristol path.
Sustrans says 2.5 million journeys are made on foot and by bike are made along the old rail route each year.
John Grimshaw, founder of the Bristol-based charity, said: "Chris had a great vision for a sustainable future."
Mr Grimshaw told BBC Bristol: "It's a sad loss. He was a great friend. I worked with him for 30 years and he was always committed to Bristol and to making the traffic better.
"I remember a few weeks ago, on his last blog, he unearthed the latest bus plan which is still showing buses going down the railway path.
"And I think we all hope that his memorial might be that the city will say 'we won't put buses on that route ever'.
Chris Hutt surveyed much of the National Cycle Network
"He was the most gifted route finder in Britain and surveyed much of the National Cycle Network in the 90s.
"He had this uncanny knack of finding the optimum route which would be most likely to attract people and that is what it is all about.
"One of his last blogs was about wonderful routes through the Hanham Gorge on the outskirts of Bristol and how that is one of the neglected jewels of Bristol.
"I think he was a great Bristol citizen."
City councillor Jon Rogers, cabinet member for transport and sustainability, said: "The first time I met him was in connection with the Bristol-Bath railway path and at that time it was under threat and Chris was fantastic on detail.
"He just had a wonderful sense of humour but he was also, as he described himself, a grumpy old man. He'd say 'Come on Jon, you can do better than this'."