Traffic Planning and Design, Inc. (TPD) is a transportation engineering and planning firm that provides various public sector design services including bridge design and inspection, highway design, traffic signal design, transportation planning, and construction management and inspection. TPD has experience with numerous projects throughout Pennsylvania involving roadway design, bridge rehabilitation and replacement, traffic signal systems, and ADA compliance. TPD is ranked as a top design/build firm in the nation and prides itself on its ability to complete complex projects on schedule and budget.