Why do some people evacuate ahead of disasters while others stay put? The rising death toll from Hurricane Matthew shows that often the poor and vulnerable are least able to move.
Getting out in a crisis is often harder than it looks. But science can help.
Crowds have the potential to provide a "fourth emergency service" - but only if we let them.
Hurricanes can be deadly to those in their path. Officials don't want to unnecessarily alarm before solid forecasts are in place, but residents need enough time to prepare and heed evacuation orders.
Transport researchers have found that when exits are located in corners, rather than the middle of hallways, they are 93.5…