For decades, dueling camps of cycling advocates have feuded about how to best accommodate riders. Some have pushed for the construction of Dutch-style cycle tracks, arguing that separated lanes make bicycling safer and less intimidating, while others have insisted such infrastructure isolates riders and makes cycling more dangerous than simply remaining within the flow of traffic. Though the debate has grown bitter at times, neither group has had much in the way of rigorous peer-reviewed research to argue their case through the years. However, in the last decade a small but energetic group of academics has started to publish regularly on the topic. ..