On June 29, 1956, President Eisenhower signed a bill to build the Interstate Highway System - a dream of his since he crossed the US in 1919 and, later, after he saw Hitler's autobahn. Little did he know what 46,876 miles of expressways would do. Fifty years on, the nation is still taking stock of the impact of high-speed roads connecting big cities. The system was finished only last year with the completion of Boston's "Big Dig" project. Instead of taking 10 years and $50 billion to build as envisioned, the 62 routes took nearly a halfcentury to finish and,...
