The biggest one is simply that Americans drive more.
Car-to-car communication could decrease urban congestion by 60 percent, one computer scientist says.
The need for better awareness about traffic strategies is quite clear.
The "car effect" explains why so many people choose to drive even when it's not in their best interest.
One civil engineer believes trip capacity will increase if cities turn to two-way streets.
A new study finds that urban minds don't pay as much attention to their surroundings unless they're highly engaging.
Hobbyist mapmaker Andrew Lynch is fascinated by what nearly was.
A new analysis of accidents from 2000-2010 finds that drivers and riders share equal fault, but not equal suffering.
At least 40 states already have a law against dooring — but in Virginia, opponents call the proposed measure "asinine."
The South Ferry station is worth it — but that doesn't mean the money should be squandered.
A new state rail map shows that it can be done — should you be crazy enough to try it.
A new California law says drivers can text and email via voice systems safely — but the evidence begs to differ.
The state's latest pilot program overcomes privacy concerns by giving drivers five options, from full tracking to none at all.
America's mayors could clearly use some inspiration.
New funding rules should speed up major projects and increase local benefits.
They may tend to adopt easier policies first, according to a new report.
Climate adaptation policy remains pretty untested.
Less than 1 percent of Santa Clara County residents ride VTA light rail, and taxpayers subsidize 85 percent of the operating costs.
What it takes to become a port city of a major cruise line.