from TheWashCycle
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Idaho presents a natural experiment to test the safety of relaxing requirements due to its state law allowing cyclists to yield [at stop signs] rather than come to a hard stop. Comparison cities lacking the law were sought and Idaho fared best for overall bicycle safety, 30.4% better than the closest match. Bicycle injuries declined 14.5% the year after adoption of the law. Interviews and a survey were conducted and all indications were that the law has been beneficial or had no negative effect, encouraging additional states to follow.
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https://www.thewashcycle.com/2011/02/compounded-public-cobenefits-of-the-idaho-law.htmloldId.20110202101908981
Biking in Baltimore