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.
Studies from institutions like Johns Hopkins University found that reducing lane width to 9 or 10 feet in cities can lower crash risks and discourage speeding without increasing congestion. traffic lane
Narrower lanes allow for "complete street" features like wider sidewalks and protected bike lanes , which further calm traffic. Lane Types and Terminology Recent urban research suggests that standard lane widths,
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
