Wiltshire Police have been out on Fisherton Street warning cyclists who have been riding in the wrong direction on the road.
Fisherton Street, which is currently undergoing significant work due to the Fishteron Gateway Project, is temporarily a one-way system heading toward the city centre.
A police spokesperson said, "Cyclists are still cycling against the one-way system leaving the city centre - this is both delivery cyclists and the general public.
"This is incredibly dangerous.
"Officers visited Fisherton Street and almost instantly stopped a commuter cycling the wrong way. If this issue continues, fixed penalty notes will be given out to prevent this practice.
"Cyclists can use Crane Bridge Road; this only adding less than a minute to leave the city."

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