I agree that what was said didn't really make logical sense. The writer was probably aware of studies where the environment stayed the same but things seemed to

I agree that what was said didn't really make logical sense. The writer was probably aware of studies where the environment stayed the same but things seemed to get safer with increased cycling. One theory for why that happens is that drivers learn to look harder when there are more bikes around. It would of been better with a bland statement about "things shown by studies" followed by the statistics.