American Segmental Bridge Institute - ASBI - Nonprofit organization which provides a forum in which owners, designers, constructors, and suppliers can meet to further refine current design, construction, and construction management procedures. Association for Bridge Construction and Design (Pittsburgh Chapter) - Information and resources for bridge design, bridge technology, and historic bridges. Post-Tensioning Institute - PTI - Research, specifications, design recommendations and provision of publications and education. Features conferences, seminars and workshops, and software. Concrete Bridge Development Group - (CBDG) - Dedicated to the task of improving efficiency of the design, construction and maintenance of concrete bridges. Features research, publications, diary of events, and membership listing. London Bridges Engineering Group - LoBEG - London highway authorities working together to improve bridge stock through out the city. Includes calendar of events, rules and constitution, and bridge data. National Concrete Bridge Council - Council of allied industry organizations to promote quality in concrete bridge construction. Features meetings and events, publications, and basic data on bridge types. National Steel Bridge Alliance - NSBA - Industry organization of businesses and agencies interested in the development, promotion and construction of cost effective steel bridges. Provides publications, software, and newsletter archive.