4 × 100 metres relay 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 relay baton is carried by each runner. Prior to 2018, the baton had to be passed within a 20 m changeover box, preceded by a 10 metre acceleration zone. With a rule change effective November 1, 2017 that zone was modified to include the acceleration zone as part
One Lap of America One Lap of America The Tire Rack Brock Yates' One Lap of America is a motorsports event in the United States that has been held since 1984. It is the successor to the Cannonball Baker Sea-To-Shining-Sea Memorial Trophy Dash, an underground auto race of the 1970s. The original premise for both is to drive cross-country, but the One Lap of America respects speed limits. Both events are the creation of automotive journalist Brock Yates. Competition occurs as time trials held at various race tracks around the country. The competitors drive from race track to race track, (often driving 24 hours