The cycle path includes cobblestones and tree pits which narrow the space for cyclists to less than 45cm (18ins) at points.
"This is in a very high profile place and has the potential to become a defining meme for inept design," said Richard Bearman, a spokesperson for Norwich Cycling Campaign.
"Spending thousands of pounds of public money on unusable facilities will make the city council and our fine city a national laughing stock."
This is in a very high profile place and has the potential to become a defining meme for inept design.
The track, which is yet to be completed, is part of £2.6m upgrade programme with the majority of the funding being provided by central government.
"Comments are being passed on a scheme which is still under construction," said a spokesperson for Transport for Norwich.
"The trees are at the edge of an extended pavement which will be levelled off providing a much wider area for cycling and the designs which were consulted on widely have passed all necessary safety checks."
(image: Norwich Cycling Campaign)
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