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 ...

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

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 ...

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 ...