As the world has installed more industrial robots, more American cyclists have been killed on roads, a correlation that suggests either that the robots are driving the delivery trucks that hit the cyclists or that the same globalizing economy automating factories is also failing to build bike lanes. The coefficient is 0.879 across nineteen years, during which both metrics climbed with the mechanical precision of things that are optimized for efficiency rather than safety. The robot assembles, the cyclist pedals, and the chart draws a line between them that no one ordered.
Industrial robot installations grew from about 100,000 per year in 2004 to over 530,000 by 2022, driven by automation in automotive, electronics, and logistics. Cycling fatalities grew from about 725 to over 1,000 during the same period. Both trends are measures of economic modernization: robots automate production while cycling grows as an urban commute mode, and both are products of a wealthier, more technology-invested global economy. The delivery trucks running automated logistics chains share the same roads as the cyclists, making this correlation slightly less abstract than most—the same supply chain that installs robots also operates the vehicles that endanger cyclists.
Nineteen years of robots and cycling deaths growing together is a story about an economy that optimizes for throughput and underinvests in human safety. The factories automate, the roads do not adapt, and the cyclist navigates the gap between progress and protection. The robot is precise. The intersection is not.
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Want to learn more about why correlations like “Bicyclist traffic fatalities” vs “Industrial robots installed worldwide” don't prove causation? Read our guide to statistical thinking.