The plan to build a new footbridge next to the Mont-Blanc bridge could be scuppered by a referendum.
The CHF 40m project has been passed by the city council. But some consider the idea to be unnecessary and too expensive.
Campaigners now have less than a month to collect 3,200 signatures.
Despite the threat of a referendum, work has started. The city has already launched a call for tenders for wooden piles needed for the construction, valued at half a million francs.
Swiss Post announce job cuts
Swiss Post will eliminate up to 110 positions in 2027, blaming shrinking letter volumes and fewer over-the-counter transactions
Autumn arrives in Switzerland
The heatwave that has gripped Switzerland since May finally breaks tomorrow
Driver warning in Vaud
Drivers in western Vaud face four nights of disruption on the A1 next week.
Mixed results in school classrooms
Swiss 15-year-olds still rank among the world's best in maths and science, but their performance in reading and maths is sliding
Good news for household bills
Swiss households will pay a little less for electricity next year
Fuel reserves now in use
Switzerland is dipping into its emergency fuel reserves for the first time this year to keep petrol and diesel flowing
