Narrower lanes allow for "complete street" features like wider sidewalks and protected bike lanes , which further calm traffic. Lane Types and Terminology
Crashes are reportedly 1.5 times higher on streets with 12-foot lanes compared to those with 9-foot lanes in 30–35 mph zones. traffic lane
Lanes are typically classified by their function or position: Narrower lanes allow for "complete street" features like
Recent urban research suggests that standard lane widths, often set at 12 feet (3.6 meters) in the U.S., may be less safe than narrower alternatives. traffic lane