Bypasses of Bypasses: A Case Study on Induced Sprawl From North Carolina

An old economic principle posits that if supply of a given item is increased, demand for said item also rises. And nowhere is this maxim more true, perhaps, than in the practice of highway building, where a billion dollar project to reduce congestion often itself becomes congested a few years after completion.

Unfortunately, this tendency is rarely considered by the transportation officials who continue to push for highway expansions, despite historic budget shortfalls and the lessons of experience.

So thank you, North Carolina, for providing this wonderful example of the hazards of induced demand. Many cities across this Southern coastal state have invested in highway bypasses only to find those very bypasses overrun with sprawl and congestion. In some cases, these towns are calling for bypasses of the very bypasses that were to reduce traffic.

The problem is so pronounced that the state's transportation secretary, Gene Conti, is drawing a line in the sand. This report is from Mary Newsom, an editor at the Charlotte Observer and creator of The Naked City blog:

Elsewhere on the Network today: Cyclicio.us reviews the book "Driven to Kill: Vehicles as Weapons," a reflection on our violent, auto-centric culture and the laws that allow motorists to kill with relative impunity. M-Bike.org outlines Detroit Mayor Dave Bing's plans to use walkable development and bike infrastructure to help attract the kind of young professionals needed to remedy the city's economy. And Rebuilding Place in the Urban Space and the Bicycle Coalition of Greater Philadelphia take a look at growing conservative opposition to livability and sustainable transportation.