Angela Serratore

A number of studies have attempted to put a figure on the reduction in vehicles that results from car sharing services. Research from UC Berkeley's Susan Shaheen goes a step further and quantifies how car sharing reduces driving. Even though most customers didn't own their own cars before subscribing, Shaheen found that the overall impact of car sharing is to lower all customers' vehicle mileage by about a quarter.

DC-area readers are wondering whether police bias was at work after a cyclist who claims to be a victim of road rage was ticketed by police in a hospital emergency room.

Typically, no one goes to the southern end of downtown Tulsa to socialize. This part of town has been so overrun with parking lots that Streetsblog readers crowned it the worst "parking crater" in the country in our first Parking Madness competition last year.

Tilikum Crossing, a new bridge across the Willamette River in Portland, is everything the hated Columbia River Crossing was not. While the CRC would have devoted billions to expanding car lanes and new highway interchanges, the Tilikum will serve only transit, biking, and walking.

Street grids are a key ingredient in a walkable city. Fortunately, many American cities -- especially the older ones -- were endowed with tightly knit grids, dispersing traffic of all types and creating good connections for people on foot.