Some say it's a security measure — but others think it's a matter of money.
Though the city sees 15 million walking trips a day, the infrastructure is abysmal. But some developers are trying to change that.
The aging car-rental giant plans to acquire Zipcar for $500 million. Here's what that might mean for users.
A new analysis disputes the idea that cities need a strong central business district to draw commuters onto transit.
We'll take a cup of kindness yet, for Auld Lang Syne.
The percentage of accidents involving alcohol varies widely by city.
They received a proposal for a "no cost" barrier system at least a year ago — and haven't moved on it.
Think your commute stinks? At least there's not a freezing microclimate happening inside your public-transit system.
The city's parallel transportation network, invented by companies like Facebook, Google and Apple, could be creating unforeseen consequences.
Highlights from the Sierra Club's list of the country's 50 best and worst.
China's fastest trains were unveiled today. Why the northeast corridor won't be getting similar treatment any time soon.
Bicyclists and public-bus commuters in San Diego are exposing themselves to a whole lot of crap in the air, according to new research.
MetroMile, an insurance company aimed at urban drivers with a low-car lifestyle, launched in Portland this month.
Turns out pedestrians who live in cities consistently over-estimate the amount of time it takes to walk somewhere. Why this matters to density.
A new study suggests that traffic reduction should be targeted at particular communities.
Starring a rusty Land Rover.
Austin and Pittsburgh don't fare very well in Walk Score's bikeability ranking.
Amtrak posts a record year, California approves high-speed rail, and more.