4 × 100 metres relay a cinder track at the 1964 Tokyo Games. The women's world record stands at 40.82 seconds, set by the United States in 2012 at the London Olympics. According to the IAAF rules, world records in relays can only be set if all team members have the same nationality. 4 × 100 metres relay The 4 × 100 metres relay or sprint relay is an athletics track event run in lanes over one lap of the track with four runners completing 100 metres each. The first runners must begin in the same stagger as for the individual 400 m race. A
All-weather running track Bill Nieder was instrumental in developing the product and selling it for this first use in the Olympics. An all-weather surface has become standard ever since. Another Tartan track was installed on a temporary basis for the 1968 United States Olympic Trials held at altitude at Echo Summit, California, before being moved to South Tahoe Middle School, where it survived for almost 40 years. An original Tartan track is still in place at "Speed City" San Jose State University on a satellite to the campus at 10th Street and Alma. Years of the abuse of tractors tearing it and cars