September 25, 2015, 11am PDT
Vocal users of the wildly popular navigation app Waze have pushed the company's developers to look for a solution to its routing algorithm's tendency to send drivers turning left through crowded intersections.
May 13, 2015, 5am PDT
After breaking down the reasons why left turns are so dangerous, it's also obvious how difficult a problem they are to solve.
October 20, 2014, 2pm PDT
Following the idea that pedestrian safety takes its cues from planners, Rachel Dovey's article on pedestrian safety lists six intersection designs that "actually prioritize pedestrians."
October 12, 2011, 12pm PDT
The FHWA says that 40% of all traffic accidents happen at intersections, and many of those are caused by left turns. A new type of intersection called the "diverging diamond" takes left turns out of the picture.