What makes a street safe? I think there are a lot of elements. The design is the first thing that comes to mind, and it’s followed by speed and traffic volume. I was curious to know how the stroad held up against other alternatives. To do this, I turned to my usual test lab: my hometown of Mankato. I examined Minnesota Department of Transportation crash data & AADT (average daily traffic volume) data in an admittedly non-scientific study.