A 17-mile pathway between Bristol and Bath is being patrolled by police after a series of assaults on cyclists.
Mr Colyer suffered a serious cut to his neck
One rider, Danny Colyer, from Warmley, South Gloucs, says he suffered a cut to his neck after fishing wire was strung across the path.
Police are now patrolling the path - but insist it is still safe to use.
Inspector Bruce Turnbull said: "Bearing in mind the large number of people that use the path, I'd suggest the reports we get are a very small number."
But Mr Colyer said the fishing wire could have left him with a serious injury.
"I was riding along and I felt something at my neck," he said.
"It was a sharp pain, the feeling of my wind pipe being blocked. It could have killed me."
Stuart Curtis, from Bath, said he was attacked from a bridge on the cycleway.
"I saw a shopping trolley come flying down off the bridge. It just missed me by a few metres.
"I've come to expect it. Something always happens here - perhaps not a shopping trolley, but maybe stones thrown at me."
Bristol-based charity Sustrans set up the track as part of a network of cycle paths across the country.
Spokeswoman Melissa Henry said: "We have around two million trips on the path every year, so these are very isolated incidents.
"I use that path every day and I have never had anything happen to me."