As a longstanding cultural icon and beloved vacation destination, U.S. Route 66's legendary notoriety continues unabated. In fact, thanks to a corps of preservationists dedicated to keeping nostalgia for the road alive, interest in America's Main Street is actually growing. But modern 66 enthusiasts aren't the first to spread the word about the Mother Road--in fact, Route 66 has a rich, decades-long history of advertising behind it. It's been more...