Almost 61 percent of voters backed the redesign of the Sechseläutenplatz, a 16,000-square-metre plaza near the city’s opera house.
The development of an underground parking lot has allowed for the doubling of an area that has traditionally been used to host the Knie Circus.
It is also the site of the traditional Sechseläuten celebration where the Böög, a symbolic effigy, is burned each spring to signal the end of winter.
The square is to be resurfaced with quartzite, while the area will also feature treed sections with benches and fountains.
Among other developments, Zurich voters on Sunday approved a 400-million-franc loan for the city’s utility EWZ to install a fibre-optic cable network in the city.
The project, undertaken with Swisscom, aims to connect 240,000 homes and businesses to the high-speed data network by 2019.
Meanwhile, voters in the Zurich municipalities of Wiesendangen and Bertschikon endorsed a merger, the first in the canton since 1934, and one that is expected to spark more such amalgamations.
Elsewhere, voters in the city of Geneva on Sunday turned thumbs down on a plan to close 50 streets to cars.
More than 56 percent of citizens rejected the plan, which was to have been for a trial period of one year.
Businesses and right-wing politicians spearheaded the drive against the road closures.
However, a plan to ultimately close 200 Geneva streets to cars, backed by the city council executive, remains in force.
And the canton of Geneva, which has ultimate control over transport planning, says it will continue to examine projects to both improve pedestrian areas and the flow of traffic in the city.