It helps to raise awareness among motorists, the public and decision makers of the dangers cyclists face on the roads, especially from other traffic.
The first Ride of Silence was organized by Chris Phelan and held in Dallas, Texas in 2003.
It has grown each year, with around 400 locations participating, most in the United States, but typically on all seven continents, including Antarctica.
In 2013, the tenth anniversary, Ride of Silence events were held in 26 countries.
In the United States, the League of American Bicyclists promotes this event side by side with national Bike Month and Bike-to-Work Day, held on the third Friday in May.