Commuter rail in the United States mostly caters to affluent suburbanites who commute to the city center. Even though these lines pass through working class city neighborhoods that stand to benefit enormously from better transit, the service they provide passes those communities by. It doesn't have to be that way.

The concept of "jaywalking" has become deeply embedded in American culture, but if you go back just a few generations, the idea that your mere presence in the street could be illegal was a novel idea. Now one elected official in Seattle is suggesting that laws penalizing people outside of cars have gone too far.

More than 112,500 people lost their lives in speed-related crashes from 2005 to 2014, accounting for 31 percent of all traffic deaths in America over that period. In a draft report released earlier this week, the National Transportation Safety Board says excessive speed is a deadly problem in our nation's transportation system -- one that federal and state officials aren't doing enough to address.

Most parking spots might cost you nothing, but parking is never really free. We just pay for it in ways that are completely divorced from our actual consumption of parking.

It's easier to blame pedestrian deaths on victims than to confront our responsibility to create a safer transportation system.

Portland's program will offer a mix of tandems, hand-cycles, and three-wheeled bikes.

Tunneling under major cities, as Musk proposes for his Hyperloop, requires a lot more than "verbal govt approval."

The largest city in North America has done away with one of the biggest hidden subsidies for driving: minimum parking requirements. The new regulations will make housing more affordable, transit more convenient, and streets less congested.

After a city installs a bike lane, there's typically some pushback for a while from people who object to the change. What's unusual is when a city loses its nerve and decides to remove the bike lane. But that's what Atlanta has done on a 1,000-foot stretch of Westview Drive.

The issue may be settled at U.S. DOT, but it's not going away. All five Democratic challengers to Larry Hogan's 2018 gubernatorial run have said they'll revive the Red Line.