Book 6,502 Government Document 5,984 Electronic 387 Serial 253 Conference Proceeding 111 Journal 70 Map 16 Reference Material 7 Photo 3 Unknown 2 see all ...

T - Technology 1,707 H - Social Science 751 K - Law 32 G - Geography, Anthropology, Recreation 27 S - Agriculture 23 Q - Science 16 F - General American History 12 A - General Works 9 E - United States History 6 L - Education 3 Z - Library Science 3 D - World History 2 R - Medicine 2 J - Political Science 1 N - Fine Arts 1 see all ...

United States Federal Highway Administration 2,567 Turner-Fairbank Highway Research Center 755 United States Federal Highway Administration. Office of Research 349 United States Federal Highway Administration. Office of Development 313 United States Federal Highway Administration. Offices of Research and Development 263 United States Federal Highway Administration. Implementation Division 175 United States Federal Highway Administration. Office of Infrastructure Research and Development 149 National Highway Institute (U.S.) 139 United States Bureau of Motor Carrier Safety 89 United States Federal Transit Administration 89 Texas Transportation Institute 87 United States Federal Highway Administration. Office of Technology Applications 82 United States Office of Highway Planning 82 United States Federal Highway Administration. Traffic Systems Division 75 United States Federal Highway Administration. Office of International Programs 73 United States Federal Highway Administration. Office of Highway Information Management 68 United States Bureau of Public Roads 62 United States Federal Highway Administration. Demonstration Projects Division 62 American Trade Initiatives, Inc 60 Comsis Corporation 58 United States Federal Highway Administration. Office of Research and Development 58 Cambridge Systematics 56 United States Federal Highway Administration. Office of Operations 55 United States Federal Highway Administration. Office of Engineering 53 American Association of State Highway and Transportation Officials 52 ERES Consultants, Inc 49 United States Federal Highway Administration. Offices of Research, Development, and Technology 48 United States Department of Transportation 46 United States Federal Highway Administration. Office of Safety R&D 46 United States Federal Highway Administration. Office of Safety 45 see all ...

English 6,841 Spanish 13 French 5

Handbooks, manuals, etc 407 Statistics 236 Periodicals 235 Handbooks and manuals 218 Government publications 150 Congresses 116 Technical reports 76 Conference papers and proceedings 75 Case studies 68 Specifications 49 Databases 28 Bibliography 23 Maps 18 Directories 17 Guides et manuels 16 History 15 Safety regulations 12 Classification 11 Electronic government information 11 Catalogs 10 handbooks 10 Actes de congrès 8 Bibliographies 8 Handbook 8 manuals (instructional materials) 8 Congress 7 Internet resource 7 Tables 7 Census data 6 Abstracts 5 see all ...

1980 2 2008 1

United States 3,693 Europe 73 California 53 New York (State) 29 North Carolina 27 Texas 27 Florida 24 Colorado 22 Michigan 22 Massachusetts 20 Pennsylvania 19 Virginia 19 Washington (State) 19 North America 18 Canada 17 Arizona 16 Oregon 15 Australia 14 Connecticut 14 Georgia 14 Ohio 14 Kentucky 12 Mississippi 12 New York 12 Maine 11 New Jersey 11 Boston 10 Illinois 10 Minnesota 10 Missouri 10 see all ...