DirectoryPennsylvania.com contains listings to browse for any aspects such as Pennsylvania business & investment, travelling, transportation, society & culture, beauty, health care, real estate, arts & entertainment, education, reference, Pennsylvania resource. Home | Submit Site | Contact Us Favorite Catgories: Accounting | Business Broker | College & University | Jewelry | Food & Beverage | Local Guides | Music Browse Categories: • By Region • Arts and Entertainment • Beauty and Health • Business and Investment • Computer and Internet • Directories and Guides • Education and Reference • News and Publication • Real Estate • Recreation and Sports • Science and Environment • Shopping and Services • Society and Culture • Traveling and Transportation Transportation You are here: Home > Business and Investment > Business to Business > Transportation Aviation (3) Trailers (1) Buses (1) Trucks (1) Link(s): 1. Concrete Safety Systems Bethel Park - maker of precast concrete highway products. http://www.concretesafety.com 2. Transtar Monroeville - consists of a group of rail and water carriers that move raw materials, semi-finished, and finished products. http://www.tstarinc.com/ 3. Union Switch & Signal, Inc. Pittsburgh - designs, manufactures, and services signaling, automation, and control equipment and systems for the railroad and mass transit industries. http://www.switch.com/ 4. Westinghouse Air Brake Co. (WABCO) Wilmerding (NYSE:WAB) - manufactures equipment for locomotives, railway freight cars, and passenger transit vehicles. http://www.wabco-rail.com/ Home | About Us | Submit Site | Link to Us | Contact Us | Disclaimer | Privacy Policy Copyright © 2005, DirectoryPennsylvania.com All rights reserved. We supply Pennsylvania information and resources with various categories of websites linking to business, health, education, media, networking, sports, news & publication.