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Experience on Cases Involving:

- Highway Safety

- Internal Circulation

- Work Zones

- Utility Poles

- Signals

- Lane Marking

- Parking

- Sight Distance

- Pedestrians

- School Zones

- Detours

- Road Closures (short- and long-term)


TPD's transportation engineers and construction supervisors have worked on nearly 100 accident cases.

Several members of TPD’s staff have prepared expert reports for accident cases in the areas of expertise including: Roadway Design, Traffic Signal System Design, Construction Management and Inspection, and Bridge Design and Inspection.

Kevin Johnson, P.E., TPD President, has served as an expert witness throughout Pennsylvania, New Jersey, Delaware and Virginia, including testimony in Commonwealth Court in Bucks, Chester, Delaware, Montgomery, and Philadelphia Counties, as well as in United States District Court. He has also prepared over 50 expert witness reports for accident cases.