Air travel congestion can quickly spread from a few cities to a whole network.
The latest look at how much time American commuters spend in traffic, and the methodology problems that come along with it.
Car-to-car communication could decrease urban congestion by 60 percent, one computer scientist says.
One civil engineer believes trip capacity will increase if cities turn to two-way streets.
Highlights from the Sierra Club's list of the country's 50 best and worst.
A new study suggests that traffic reduction should be targeted at particular communities.
High-tech high-occupancy tolls come to the nation's capital. Is this the future of highway infrastructure?
New research finds that parking minimums are indeed bad, but that parking maximums still need fine-tuning.
Closing 10 miles of Los Angeles's busiest freeway for a second time was as uneventful as officials hoped.
Proposed expansions of dozens of major arteries in Bangalore are threatening the Indian city's way of life.
Most of us know better than to read and drive, but we’ve all been guilty of bad behavior at one point or another.
They invite fraud, drain city revenue, and often fail to help those who need it most — new research proposes an alternative.
Researchers are using rider data to better understand how stressed subway crowds flow through the system.
By trapping characters indefinitely, fictional jams can set up otherwise implausible plotlines.
The Russian capital has officially added more than 500 square miles to its footprint.
A six-mile loop of moving platforms could have been the congestion solution 1903 New York needed.
Yes, according to one new study.
Road trains — semi-autonomous highway platoons — recently completed a promising trial, but questions remain.
Can a city reduce the number of deaths to zero?