In an article for CityLab, "Why 12-Foot Traffic Lanes Are Disastrous for Safety and Must Be Replaced Now," Jeff Speck explains that "the single best thing we can do for the health, wealth, and integrity of the nation" is to narrow the standard lane width in towns and cities, on all roads except expressways, from 12 to 10 feet in width.

While the article was written for a popular audience, the author does reference and provide links to more technical studies by professional traffic engineers on the issue of lane width, including an article by Theodore Petritsch, P.E. PTOE, entitled "The Influence of Lane Widths on Safety and Capacity: A Summary of the Latest Findings," and the TRB study "Relationship of lane width to safety for urban and suburban arterials."