Years and years a test was made in a little city in Switzerland. The results where scary. There have been lots and lots of accidents. So many that the author

Years and years a test was made in a little city in Switzerland. The results where scary. There have been lots and lots of accidents. So many that the authorities decided to continue the test, but only at the condition that bells (like the ones cows are wearing) where added to the cars, so that pedestrian could hear them.