In the same referendum, Swiss voters have approved a twenty-two-billion dollar railways project, which is intended to limit the volume of European freight crossing the country by road.

Two-thirds of voters approved building two huge new tunnels through the Alps.

One route, which will improve links between Zurich and Turin, involves drilling the world's longest railway tunnel for fifty-seven kilometres through Mount Gotthard.

Voters also approved a proposal to liberalize women's working hours so they can work night-shifts.

In the city of Zurich, voters approved funding a health project for male prostitutes.