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L.K. Comstock is one of the United States' largest specialty electrical contractors serving the transit industry. A subsidiary of RailWorks Corporation, the firm specializes in performing design support, engineering, project management, installation, testing, start-up and maintenance services for transit systems in heavy and commuter rail, light rail and automated people mover applications. L.K. Comstock performs these transit systems services: train control and signals, OCS and traction power, communications and security, SCADA and systems integration and facilities and trackwork. L.K. Comstock has an unparalleled record of accomplishment, completing more than 100 projects for most of the major US transit authorities with work totaling in excess of $3 billion.