Herald.com | 09/23/2004 | The day cars disappeared: Cities focus on traffic, smog

Sept. 22 was The day cars disappeared, as cities focus on traffic, smog: "More than 1,500 municipalities, chiefly in Europe, participated in the seventh annual car-free day campaign by setting up roadblocks to prevent nonessential automobile traffic from entering city centers. The campaign also spread to cities in Japan and South America."