Avoiding the Unintended Consequences of Transit-Oriented Development
We see it over and over again in our cities. Migration out of central cities hollows out neighborhoods and leaves the people who remain struggling with the consequences of disinvestment. But when development returns to urban areas, the arrival of new residents can impose burdens on people who never left. Often, as amenities come into an area and crime goes down, property values rise and poorer residents can no longer afford to live there.

The addition of light rail has been linked to higher rates of car ownership, as compared to the Metropolitan Statistical Area as a whole, but that doesn't mean we should stop building light rail. Image: Dukakis Center (PDF)
Even when the new development is built around transit, which can lower transportation costs for low-income residents, unintended consequences can ensue.
Researchers with the Dukakis Center for Urban and Regional Policy have recently reached some provocative conclusions from their study of gentrification and transit-oriented development. Without proper planning, they found, new development near transit can lead to stratified neighborhoods and higher rates of car ownership.
They also offered some solutions to ensure that transit-oriented development achieves its intended goals. The solutions include preserving affordable housing and restricting parking in new developments.
Historically, the authors notes, transit-rich neighborhoods tend to be diverse. The low-income people and people of color who live there often don’t have cars and they depend on public transportation. They also usually rent their homes — and since rental housing turns over faster than owner-occupied homes, this speeds along the process of gentrification when new transit options come to a neighborhood.
Rents go up as transit arrives (often along with new shops and restaurants) and more affluent people move in. And guess what? Those wealthier people tend to have more cars. That’s the fundamental paradox: the people who are attracted to transit-rich neighborhoods – and have the money to pay more to live there – don’t use transit as much as less affluent people who can get priced out.
The authors stop short of calling this pattern “displacement” – they point to “normal processes of housing turnover and succession.” But what’s clear is that the people moving in are from a different income demographic than those moving out (though the researchers say the racial makeup tends to stay the same).
Income-based housing stratification and more cars are not the outcomes planners want from transit or transit-oriented development. The challenge is to keep development around transit from becoming too exclusive and too car-oriented. How can communities do this?










