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Ken E. Johnson P. E.
Work Zone, Pavement Marking & Traffic Devices Engineer
Minnesota Department of Transportation
Office of Traffic, Safety, and Technology
Phone: 
(651) 234-7386
ken.johnson@state.mn.us
Terry McDuffie
State Construction Engineer
Alabama Department of Transportation
Phone: 
(334) 242-6208
mcduffiet@dot.state.al.us
David L. McFarland
LTAP Teaching Associate
Louisiana Local Technical Assistance Program
Office of Technology and Transfer
Phone: 
(225) 767-9118
dmcfar@ltrc.lsu.edu
Thomas N. Notbohm
State Traffic Engineer of Design
Wisconsin Department of Transportation
Bureau of Traffic Operations
Phone: 
(608) 266-0982
thomas.notbohm@dot.wi.gov
David Orr P.E., Ph.D.
Senior Engineer
Cornell Local Roads Program
Phone: 
(607) 255-8033
dpo3@cornell.edu
Gene Putman P.E., PTOE, CEM
Transportation & Emergency Management Manager
City of Thornton
Phone: 
(720) 977-6254
Gene.Putman@cityofthornton.net
Charles E. Riedel
Acting Director, Safety Programs and Technical Operations Bureau
New York State Department of Transportation
Office of Traffic Safety & Mobility
Phone: 
(518) 457-2185
criedel@dot.state.ny.us
David B. Rush
Engineer II/Work Zone Safety Program Manager
Virginia Department of Transportation
Traffic Engineering Division
Phone: 
(804) 371-6672
David.Rush@vdot.virginia.gov
Jonathan Shi Ph.D., P.E.
Professor and Director of Center for Work Zone Safety and Mobility
Illinois Institute of Technology
Department of Civil, Architectural and Environmental Engineering
Phone: 
(312) 567-3630
shi@iit.edu
Douglas R. Small
Assistant Manager - Project Reviews
Massachusetts Department of Transportation
Highway Division
Phone: 
(617) 973-7370
douglas.r.small@state.ma.us


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