This is the first map in my collection that isn't from the 1890s. This map is from 1972, around the time of the second bike boom in the United States. I am on a quest for more bike maps from this time period.
"This “Guide Map of the City of Detroit for Bicyclists, Showing Pavements” was copyrighted during the bicycle boom of the 1890’s...The map’s title points out its most striking detail: the color-coded mish-mash of various pavement types, ranging from…