Traffic is building up in the City due to the introduction of new cycle superhighways, according to a report by the City of London Corporation.
The superhighways have been put in by Transport for London (TfL) to make sure cyclists can move more safely through the City's busy roads, but the road system is still adjusting to the changes.
The report says: "The most significant impact on the City's road network in the last 12 months has been the construction and subsequent operation of TfL's cycle super highway, and although it is too early to reach definitive conclusions, observations would suggest that areas of traffic congestion can frequently be found on those roads directly affected by the scheme."
It has become more difficult to re-route traffic when main roads need to be closed for improvements. The City of London Corporation has said it wants to encourage City workers to cycle, and has put forward solutions to the current problems being caused by the new cycling routes.
A spokesperson for the City of London Corporation said: "We are working hard to encourage workers and residents of the Square Mile to cycle and walk more regularly, with the aim of 10 per cent of City workers walking or cycling to work by 2030.
"We are looking at ways to improve the flow of the City's roads and work closely with TfL to ensure Cycle Superhighways fit into the City as smoothly as possible."