Alas, I´ve never seen one anywhere in Europe. Wouldn´t it be nice though?

They did shut down one of the main roads once a year when I lived on Lake Constance. There would be a Sunday in the summer when the road was open to rollerbladers and cyclists only.
Oh, my husband is just telling me about "car free Sundays" during the oil crisis in the seventies.
Great idea
Bron