Plans for a huge network of cycle lanes in London are falling behind schedule and suffering from a lack of commitment, a report has found.
Cycling in London is growing in popularity
The £147m London Cycle Network Plus of radial and orbital routes covering the whole of the city, could be seven years behind schedule, it suggested.
The London Assembly report suggests a lack of political will is to blame.
But Transport for London (TfL) said the project was on target to be finished by 2009/10 and within the set budget.
The London Assembly wants a serious commitment from Transport for London and the boroughs, and more funding for cycle lanes.
The London Cycle Network (LCN) project is being managed by TfL, in partnership with the London Borough of Camden.
But the report found some boroughs were not taking part and suggested a lack of political will was "a critical obstacle to completion".
It said some completed schemes had not met TfL's standards and there was a tendency to focus on finishing easy sections first, which was creating a piecemeal network.
And there are fears it will not be completed until 2016 - seven years late - and will not meet cyclists' needs.
While recognising the project was making a good contribution to improving cycling conditions, it urged those behind the project to "think bigger".
Its conclusion reads: "The project is in danger of drifting well beyond its delivery date and of not making the dramatic changes that will really excite and encourage cyclists."
TfL said the LCN was well on target to be completed on time and said the network was well-designed and was already increasing cycling in London.
A TfL spokesman said £43m has so far been spent on the first half of the £140m LCN project since work began in 2002.
"There is a great deal of political will to support cycling in London," he said.
"However, we do need more London boroughs to come on board and to support the mayor's vision to make London a world class cycling city."