Collections : [University of Michigan Special Collections Research Center]

The Left vs. Right Priority subseries consists of three folders and contains materials in a variety of languages, including English, French, and German. The articles deal primarily with whether right-of-way priority ought to be ceded to the left or the right in order to best relieve traffic congestion. Included are research articles from England, continental Europe, and the United States.

The Pedestrians subseries, consisting of three folders, details the development of laws and regulations concerning pedestrian right-of-way and safety. Included are articles on jaywalking and priority for pedestrain road crossings.

The Traffic Signals subseries describes the evolution of traffic signals and traffic signal regulations in the United States throughout the early 20th century. Included are statistics on relative success of various signals and reports on the safety and efficiency of signaling methods. The subseries contains four folders.