
From the September 26 1895 issue of the San Francisco Call
When the first diamond frame bicycles became popular in the 1890s they were often called "wheels" - the national cycling association was called the "League of American Wheelmen." We have moved from "wheels" to "bikes," but the bicycles have remained remarkably the same over more than 100 years - elegant in their efficiency and simplicity. And many of the issues that we think are new? They were around then too.
But when there are a lot of bicyclists on the road, according to this theory, drivers take notice. They become more attentive, slow down, pass more cautiously, double-check their blind spots, expect the unexpected. They sense that the road has become a more complicated place, and adjust their behavior accordingly. As a result, the road becomes safer, presumably for everyone.