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Roads
21
Bridges
16
Design and construction
16
Maintenance and repair
16
Management
13
Pavements
13
Transportation
10
Data processing
8
Safety measures
7
Testing
6
Environmental aspects
4
Live loads
4
Planning
4
Specifications
4
States
4
Traffic safety
4
Transportation agencies
4
Concrete bridges
3
Floors
3
Highway departments
3
Highway engineering
3
Inspection
3
Quality control
3
Road markings
3
Subgrades
3
Traffic flow
3
Culverts
2
Evaluation
2
Highway communications
2
Highway planning
2
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American Association of State Highway and Transportation Officials
National Research Council (U.S.). Transportation Research Board
67
National Cooperative Highway Research Program
55
United States. Federal Highway Administration
40
Transit Development Corporation
3
United States. Federal Transit Administration
3
Anderson, S. D.
2
Geoffroy, Donald N.
2
Hughes, Charles S.
2
McGhee, Kenneth H.
2
Transit Cooperative Research Program
2
Appleman, Bernard R.
1
Banerjee, Frances T.
1
Bared, Joe Georges
1
Benke, Robert J.
1
Bierbaum, Roger E.
1
Blaschke, Byron C.
1
Boyd, M. Annabelle
1
Burke, Martin P.
1
Campbell, John L. 1952-
1
Campbell, Sarah
1
Chamberlin, William P.
1
Christopher, Barry R. 1943-
1
Christopher, Barry R. 1949-
1
Cluett, Christopher
1
Conner, Robert J.
1
Czerniak, Robert J.
1
Dexter, Robert J. 1956-
1
Dorton, Roger A.
1
Dunn, Walter M.
1
Zobacz wszystkie ...