History of road transport Edgar Purnell Hooley, who noticed that spilled tar on the roadway kept the dust down and created a smooth surface. He took out a patent in 1901 for tarmac. Hooley's 1901 patent for Tarmac involved mechanically mixing tar and aggregate prior to lay-down, and then compacting the mixture with a steamroller. The tar was modified by adding small amounts of Portland cement, resin, and pitch. History of road transport The history of road transport started with the development of tracks by humans and their beasts of burden. The first forms of road transport were horses, oxen carrying goods over tracks
Playground surfacing Playground surfacing A playground surface is the material that lies under and around swings, slides, monkey bars and other playground equipment. The surfaces are usually made of wood or rubber and designed specifically for aesthetics, child safety, and/or ADA wheelchair accessibility. Playground safety surfacing often involves the use of recycled rubber tire products such as poured rubber, rubber tiles or loose rubber mulch. Applies only if a drainage system is installed. OF PLAYGROUND SURFACES. In the United States, playground-related injuries send 200,000 children to an emergency room every year. If visits to doctors are included, the figure rises to 500,000