Road racing is one of the disciplines of the sport cycling that is performed on paved roads. It is the most popular form of bicycle racing with respect to the no. of participants, events, and spectators. Professional racing is very famous in the western parts of Europe particularly in France, Spain, Italy and Low Countries. The sport emerged from recreational racing to professional races in the mid-1980s and spread widely all around the globe though semi-professional and amateur competitions are also organized till date in many countries. Cycling is administered by Union Cycliste Internationale (UCI) at the global level, and the body is also responsible for organizing World Championships. Tour De France, the biggest event cycling event, is a three-week long race that attracts more than 500,000 roadside supporters a day.