Shared bikes are staged at Potsdamer Platz in Berlin, between a remnant of the Berlin Wall and the new entrance to the train station. Steve Tracy/Courtesy photo

Houten, the Netherlands, boasts world-class bicycle infrastructure. The city was declared the best cycling community in the world in 2008 in part due to designs that free cyclists from almost any encounter with arterial street vehicle traffic. Steve Tracy/Courtesy photo

A Dutch junction in use in Rotterdam, the Netherlands. This style of intersection is being recommended for the East Covell Boulevard corridor in Davis. Steve Tracy/Courtesy photo