It looks likely the plans for a new footbridge next to the Mont-Blanc Bridge will go to a vote after campaigners submitted what they say is enough signatures.
Those opposed to the idea says it costs too much – CHF 54m, which will be shared by the City, the Canton, the Confederation and the Hans Wilsdorf Foundation.
They also argue it will do nothing to help the transport situation in Geneva and it will be ecologically damaging.
They claim to have support from many different political parties as well as neighbourhood and transport associations.
Before a vote is confirmed, authorities have to check there are at least 3,200 valid names – campaigners say they have 4,109.