Campaigners in Geneva have collected enough signatures to fight plans to change how public transport fares are set.
Currently the Grand Council must vote on any changes.
The canton wants to pass the decision to the cantonal executive and the TPG board. This means that any fare changes couldn’t be challenged by a referendum.
That decision will now go to a popular vote after more than 7,000 names were collected, 4,000 is needed.
The issue has united different wings – the right-wing Geneva Citizens Movement and the Left-Wing Alliance both oppose the plan.
It will not affect the already agreed plan for free transport for the under 25s, due to start next year.