In past decades, pessimists delighted in predicting that the U.S.'s automobile explosion would eventually overtake the country's highway system and bring traffic to a full stop. They did not allow for U.S. enterprise. On the East Coast, the continent's most congested traffic corridor and the world's biggest urban sprawl, a motorist can now whip along the 435-mile route between Washington and Boston without ever encountering a stop light.
This Detroit daydream come true was made possible last week by the opening of a new superhighway that bypasses "Gasoline Alley," an elevenmile stretch of...