A long-overdue west London cycle superhighway looks increasingly likely to be cut short.
Cycle Superhighway 9 was due to open in 2014 and to run between Hounslow and Hyde Park.
But after numerous setbacks there is now no estimated completion date, and opposition from Kensington and Chelsea Council has prompted suggestions it may now only run through the boroughs of Hounslow and Hammersmith and Fulham .
That looks even more likely to be the case after Sadiq Khan said Transport for London was working with Hounslow and Hammersmith and Fulham councils but failed to mention Kensington and Chelsea.
If so it means the route would stop at Kensington Olympia rather than running all the way to Hyde Park .
'Still in early stages of design'
London Assembly member Caroline Russell had asked the London mayor for an assurance the cycle route would not be allowed to stop at the borough boundary, but she failed to receive that guarantee.
"Cycle Superhighway 9 is currently still in the early stages of design and is subject to further work and discussion with key stakeholders," the mayor responded.
"These routes are delivered with the borough and other partners, and need to have their support in order to proceed.
"Transport for London has been working with the London Boroughs of Hounslow and Hammersmith and Fulham to develop proposals."
'Don't let individual boroughs scupper crucial schemes'
Ms Russell said: "Only three out of 18 outer London boroughs have a dedicated cycle route linking them with the city centre and that's not good enough.
"The capital needs a strategic network of cycle routes fanning out across the city and individual boroughs must not be allowed to scupper these crucial schemes."
The Green Party member said the new sections of central London superhighway had been hugely popular but additional safe routes were needed in the suburbs.
"The mayor needs to build on the progress made in recent years and get on with building all of the routes in the pipeline, in full," she said.
Ms Russell has previously raised concerns about the future of the proposed Westway cycle route between Acton and Paddington.
Safety concerns behind objection
Kensington and Chelsea Council has objected to the CS9 superhighway as the route would involve a segregated cycle lane running through the borough.
The council has said it is not "anti-bike" but has concerns about the safety of pedestrians having to cross a fast-moving cycle lane.
London Cycling Campaign has said it is "not good enough" for CS9 to stop at the Kensington and Chelsea borough boundary.
The group also wants the new superhighway to be extended to Heathrow.
Former London Assembly member Darren Johnson suggested earlier this year that the London mayor should get additional powers to push through cycle routes in the face of objection from local councils.
