Dan Henry

Dan Henry (1913-2012) is the inventor of directional pavement markings commonly used to guide participants along the route of organized bicycling events. The markers themselves are usually called "Dan Henrys".^[1]

Originally, the markings consisted of a circle with a vertical line from the edge of the circle pointing in the direction of travel (up, left, right). Other common markings are a circle X to denote wrong way, and a circled horizontal line to denote caution.

Variations on the circle pattern developed to differentiate between different rides as more and more rides began to use the same roads. Variations include color, triangles, squares, letters, etc.^[2]

Other cycling related inventions by Henry include front and rear suspension systems and the 'sling' saddle.^[3]

Honors

The League of American Wheelmen awarded Henry their Paul Dudley White Medal in 1992^[4] and a bike route in the Santa Ynez Valley has been named for him.^[5]

References

Persondata
Name	Henry, Dan
Alternative names
Short description	American cyclist
Date of birth	1913
Place of birth
Date of death
Place of death