1) ALASKA RAILROAD

2) AMERICAN SHORT LINE & REGIONAL RAILROAD ASSOCIATION

3) CANADIAN NATIONAL RAILWAY

4) Capital Metropolitan Transportation Authority

5) Carpi & Clay on behalf of Transbay Joint Powers Authority

6) CITY AND BOROUGH OF JUNEAU

7) Joliet Regional Port District/Lewis University Airport (KLOT)

8) Milhouse Engineering And Construction , Inc on behalf of Cook County

9) NORTHEAST ILLINOIS REGIONAL COMMUTER RAILROAD CORPORATION

10) Philadelphia International Airport

11) Railway Engineering Maintenance Suppliers Association

12) SOUTHERN CALIFORNIA REGIONAL RAIL AUTHORITY

13) U.S. RAS Association-Midwest

14) VIA Metropolitan Transit