Angie Schmitt

Cyclists should pay their "fair share" for streets -- it's a favorite complaint of newspaper commenters worldwide.

What impact will self-driving cars have on cities?

Where bicyclists were once a trickle in Philadelphia, they are now a steady stream.

"Shared spaces" are streets where driving is allowed but walking and biking take priority. They are designed without curbs, signage, and other typical markers that separate cars from people on foot. The design cues are subtler. Everyone mixes together in the same space, and drivers travel slowly enough that they can make eye contact with pedestrians.

In cities considering a light rail project, it's common for transit opponents to suddenly cast themselves as big believers in bus rapid transit. They don't really want to build BRT, they just want to derail the transit expansion. The light rail advocates then have to make their case not only on the merits of the project, but also in relation to the strawman BRT project.

City leaders from around the world are meeting right now in Quito, Ecuador, for the summit known as Habitat III -- convened by the United Nations to map out a strategy for sustainable urbanization as more people flock to cities.

The wheels of change grind slowly at the institutions that guide the American traffic engineering establishment, but they are moving forward.

Rents continue to rise in cities across the U.S., and Pittsburgh is no exception. Noting the escalating housing costs in walkable neighborhoods, Alex Shewczyk at Bike Pittsburgh looks at how transportation and housing policy can coordinate to make places more affordable.

WMATA, the DC region's transit agency, is in crisis.

Sprawl isn't just a problem in car-centric America. Even cities with the world's best transit systems are surrounded by suburbs with poor transit access, according to a new report by the Institute for Transportation and Development Policy. As billions of people migrate from rural to metropolitan areas in the next few decades, these growth patterns threaten to maroon people without good access to employment while overwhelming the climate with increased greenhouse gas emissions.