Although modular steel bridges have existed for half a century, they have never been utilized to their maximium potential. Now, with technological innovations in design, materials and construction techniques, modular steel bridges may prove to be an excellent vehicle for curing America's and the world's transportation ills. This book aims to educate professionals in the construction industry as to the full range of capabilities, applications and opportunities furnished by modular bridge systems. It is divided into three sections relating to: the market for modular steel bridges, the associated technology and specific modular steel bridge systems. Application case studies are included in each chapter.