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References
- Gannett Fleming, Inc.
- Pennsylvania Department of Transportation
- Pennsylvania Turnpike Commision
- New York City Department of Street Lighting
- New York State Department of Transportation
- New Jersey Department of Transportation
- New Jersey Turnpike Authority
- New Jersey Highway Authority
- Delaware Department of Transportation
- Ohio Department of Transportation
- MTA Bridges and Tunnels, New York
- Arizona State University, Phoenix, AZ
- Bowie State University, MD.
- University of Maryland, Shady Grove, MD.
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