Franklyn Cater

In the nation's capital, park planners have drawn up an ambitious plan to transform an old bridge into an active recreation space. If realized, the park would offer a physical and symbolic link between two very different communities.

As many cities add bus and bike lanes, raise parking rates and increase traffic enforcement with cameras, some motorists feel like they're under attack. But advocates of these changes say they give people more options for getting around and make cities safer.