A renowned historian and engineer explores the past, present, and future of America's crumbling infrastructure.Acclaimed engineer and historian Henry Petroski explores our core infrastructure from both historical and contemporary perspectives, explaining how essential their maintenance is to America's economic health. Petroski reveals the genesis of the many parts of America's highway system--our interstate numbering system, the centerline that divides roads, and such taken-for-granted objects a . CLICK HERE TO DOWNLOAD THIS BOOK FOR FREE