Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...

KNOXVILLE, Tenn. — A young hawk in New Jersey turned rush hour traffic into its personal hunting ground. This bird cracked the code of urban traffic patterns and used them as a weapon, with pedestrian ...

Unfortunately, this book can't be printed from the OpenBook. If you need to print pages from this book, we recommend downloading it as a PDF. Visit NAP.edu/10766 to get more information about this ...

The length of the green signal on pedestrian crossings assumes that people can walk at a speed of 1.2 m/s. Scientists find ...

Pedestrian crossings generally showcase the best in pedestrian behaviour, with people naturally forming orderly lanes as they cross the road, smoothly passing those coming from the opposite direction ...

The magazine’s Ethicist columnist on the intersection of courteousness and lawfulness on city streets. By Kwame Anthony Appiah I recently started using my bike as my main mode of transportation, and ...

The time it takes to cross a road when the green man is showing is often too short an interval for the elderly or those with mobility issues to use them safely, new research has said. The research, ...