This is what it looks like when hundreds of thousands of people stand still at the exact same time.
How to get where you're going by foot, by car, by transit and bike, all on one map.
This is what it looks like when hundreds of thousands of visitors stream through downtown Washington.
A decree from the D.C. Taxicab Commission will force drivers to install credit card machines by Mar. 31.
We're going to get a windfall of gun research thanks to Obama's new policy. Here's what we want to know.
In much of the country, walking – that most basic and human method of movement, and the one most important to our health – is all but impossible.
According to new research, where college-educated folks live has a lot to do with population size.
Some say it's a security measure — but others think it's a matter of money.
Public spaces decked out in the season's finest.
The gas stations, theaters and monuments saved this year.
It's been an eventful year for cartography.
Traditionally stingy with new growth, the city appears to be on the cusp of a major construction cycle.
Cities have largely given up on pedestrian scrambles — but some are bringing them back.
Homicide rates have fallen significantly in some places. Does economic development deserve the credit?
New York and Washington are easing their restrictions.
A 40-by-60 foot map is helping organizers plot parade routes, choose muster locations, everything.
A small number of coastal cities get the bulk of the benefit.
Declaring public space smoke-free is becoming exponentially more common. Enforcing it is not.