A man dressed up as a clown scared random bystanders with a road roller. In 1921 Goelitz's leg was crushed between a cement mixer and a road roller. A campaign is underway to restore the road roller to working condition. Ammann developed an internal-combustion powered Road roller in 1911. The CA 25 road roller introduced in 1970 became the world's leading compaction roller. Built in 1912, it was a 10-ton slide-valve, single-cylinder, 4-shaft, road roller.