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| American Association of State Highway and Transportation Officials (AASHTO) | 1995 | 1978 |
| American Railway Engineering Assoc. | 1978,84 | |
| American Road and Transportation Builders Association | 1978,84,91 | |
| American Society of Civil Engineers | 1978 | |
| Associated General Contractors of America | 1984 | |
| California Depart. of Transportation | 1995 | |
| Colorado Department of Highways | 1991 | |
| Federal Highway Administration | 1978,84,91,95 | |
| Federal Railroad Administration | 1978,95 | |
| International Assoc. for Bridge and Structural Engineering | 1978 | |
| International Road Federation | 1984,91 | |
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Minnesota Chapter, American Public Works Association |
1984 | |
| Minnesota Depart. of Transportation | 1984 | |
| Missouri Pacific Railroad Company | 1978 | |
| Missouri State Highway Commission | 1978 | |
| National Assoc. of County Engineers | 1978,84 | |