An article in Crain’s Chicago Business posits the existence of the “Mary Poppins Effect,” in which people who dress up a little when they ride their bikes, as opposed to wearing bike or athletic gear, experience better treatment from drivers. “It helps drivers realize bicyclists are people too,” Dottie Brackett of Let’s Go Ride a Bike is quoted as saying. Other items that may help include helmets and child trailers (even if they aren’t being used to cart infants around).