Fifty years ago, in 1925, when the first formal road show was conducted in Chicago, the crowd of approximately 15,000 people was thought to be spectacular. Now, the ConExpo, formally known as the Road Show, is anticipating a Chicago crowd of at least 150,000 to wander through the International Amphitheatre and McCormick Place to view practically every piece of construction equipment that is manufactured in the world.

For the rest of this article, and a look back at nearly a half-century of ConExpo history, click here.