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Speed Experiment
The 10 km/h Illusion
Enter your trip details below and discover exactly how much time you “save” by pushing the pedal a bit harder.
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🚗 Normal · 50 km/h
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🏎️ Rush · 60 km/h
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Difference
300s
Of total
16.7%
km
50 km/h
2060100160
60 km/h
55+10 km/h over200
Going 10 km/h over the limit
💡 Why This Matters
The relationship between speed and time saved is not linear — it follows a curve of diminishing returns. Going from 50 to 60 km/h saves far less time than going from 20 to 30 km/h, even though both are a 10 km/h increase.
The formula is simple: time = distance ÷ speed. But our brains aren't wired to intuitively grasp the gap between two reciprocals.
This is why speeding feels like it should save much more time than it actually does. It's a cognitive illusion — and now you can see through it.