AUTHOR
American Association of State Highway and Transportation Officials
National Research Council (U.S.). Transportation Research Board
6
United States. Federal Highway Administration
5
National Cooperative Highway Research Program
4
Brooke, Ken
1
Davinroy, Thomas B.
1
Dudek, Conrad L.
1
Gamble, Hays Bentley
1
Plaxico, Chuck A.
1
Roark, John J.
1
Roy Jorgensen Associates
1
Ullman, Gerald L.
1
United States. Federal Transit Administration
1
Urbanik, T. 1946-
1
Wooldridge, Mark Douglas 1960-
1