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HNTB is a trusted adviser and provider of innovative rail and transit solutions to the nation's largest freight rail companies and transit authorities. We plan, design and construct rail and public transportation systems and facilities for all modes of transit across the country. Our expertise includes management of all phases of a project: initial conceptual design, feasibility studies, environmental assessments and permitting, capacity planning, preliminary engineering, final design and construction management. HNTB has more than 60 offices nationwide.