In cities with bike shares, a significant number of short distance bike trips are on the bike share (like, 50% plus range). Requiring a bike helmet eliminates

In cities with bike shares, a significant number of short distance bike trips are on the bike share (like, 50% plus range). Requiring a bike helmet eliminates those people that are walking around and decide to use a bike share to go 2 miles. Tying a helmet to a bike can result in theft and weathering (rain). The article goes to describe that it is the secondary effects that are important. Ie, it's better to have 100 cyclists on a road with 50% helmet usage, than it is to have 3 with 100% usage. I've seen campaigns and memorial stickers asking drivers to watch for motorcycles. So it is not dissimilar for pedal bikes, except the safety effect for driver awareness is even more important for non-motorized bikes. Which is essentially the non-intuitice conclusion of the article.