Air travel congestion can quickly spread from a few cities to a whole network.
In Austin, maps are color-coded by comfort level rather than traffic-engineering standards.
A real-world screening of Speed ended with a small miracle of bureaucratic coordination.
Photo journalist Rebecca Davis captures riders in a voyeuristic style reminiscent of Walker Evans.
Sidecar hopes to compete with Uber by using part-time drivers and letting riders decide what to pay. Will it work?
How something so statistically unlikely managed to captivate our imaginations.
More and more city planners are seeing bike lanes as "a rational part of the mobility picture."
A new report on Montreal's BIXI shows cycling rates increase by the end of season two.
50 years ago, experts predicted automobiles would drain the life from urban areas. Their predictions are coming true.
We've got a "typology radar graph" for that.
Readers offer their suggestions — with road fare emerging as a top choice.
Delivery trucks are responsible for a big chunk of the congestion we experience. Here are some ideas for getting them off the road.
How not to save parking spots during a historic snowfall.
Hot-air balloons! Squishy, non-circular wheels! A competition to rethink bicycling in Singapore is producing some strange results.
Riding a bike may have special benefits that other exercise modes don’t, but we just don't know enough about it.
Considering the "historic" blizzard in this weekend's weather forecast and all.
It's the oldest, dumbest trick in the book.
The latest look at how much time American commuters spend in traffic, and the methodology problems that come along with it.