| Company Name | City | State | Cntry/non-US |
| ABBINGTON-NEY ASSOCIATES | Freehold | NJ | |
| ABRAMS ASSOCIATES | Walnut Creek | CA | |
| ACCESS ENGINEERING, INC. | Eugene | OR | |
| ADA COUNTY HIGHWAY DISTRICT | Boise | ID | |
| ALPHA ENGINEERING GROUP | Bellevue | WA | |
| AMERICAN UNIVERSITY OF BEIRUT | New York | NY | |
| ARIZONA DEPARTMENT OF TRANSPORTATION | Phoenix | AZ | |
| ASSOCIATED TRAFFIC CONSULTANTS | Pasadena | CA | |
| ASSOCIATED TRANSPORTATION ENGINEERS | Santa Barbara | CA | |
| ATD, INC. | Woodinville | WA | |
| ATEP INC. | Lake Oswego | OR | |
| AUSTIN-FOUST ASSOCIATES | Santa Ana | CA | |
| AVID ENGINEERING, INC. | Albuquerque | NM | |
| BANGLADESH ROAD TRANSPORT AUTHORITY | Washington | DC | |
| BANKSTON PINE ASSOC. | Newtonville | MA | |
| BARTON-ASCHMAN ASSOCIATES | San Jose | CA | |
| BARTON-ASCHMAN ASSOCIATES INC. | Pasadena | CA | |
| BARTON-ASCHMAN ASSOCIATES INC. | Albuquerque | NM | |
| BECHTEL/PARSONS BRINCKERHOFF | Boston | MA | |
| BELL-WALKER ENGINEERS, INC. | Boise | ID | |
| BENTON FRANKLIN REGIONAL COUNCIL | Richland | WA | |
| BERGER LEHMAN ASSOCIATES | Rye | NY | |
| BERGER/ABAM ENGINEERS, INC. | Federal Way | WA | |
| BERNARDIN, LOCHMUELLER & ASSOCIATES, INC. | Evansville | IN | |
| BERRYMAN & HENIGAR | Seattle | WA | |
| BETTIGOLE, ANDREWS & CLARK, INC. | Buffalo | NY | |
| BETTIGOLE, ANDREWS & CLARK, INC. | New York | NY | |
| BI TRAN SYSTEMS | Sacramento | CA | |
| BINGHAMTON METROPOLITAN DISTRICT | Binghamton | NY | |
| BOEING COMPUTER SERVICES | Seattle | WA | |
| BOHANNAN-HUSTON INC. | Albuquerque | NM | |
| BRIGHAM YOUNG UNIVERSITY | Provo | UT | |
| BRUCE F SCHAFER, PE | Salem | OR | |
| BRUNO ASSOCIATES | Woodstock | VT | |
| BUCHER WILLIS & RATLIFF | Aurora | IL | |
| BUCHER, WILLIS & RATLIFF | Kansas City | MO | |
| BUCHER, WILLIS & RATLIFF, INC. | Seattle | WA | |
| BUTTE COUNTY ASSOCIATION OF GOVERNMENTS | Oroville | CA | |
| C G ENGINEERING | Redlands | CA | |
| C&S ENGINEERS, INC. | North Syracuse | NY | |
| CALIFORNIA POLYTECHNIC STATE UNIVERSITY | San Luis Obispo | CA | |
| CALIFORNIA STATE UNIV.-SACRAMENTO | Sacramento | CA | |
| CAMBRIDGE SYSTEMATICS, INC. | Oakland | CA | |
| CAPE COD COMMISSION | Barnstable | MA | |
| CAPITAL DISTRICT TRANSPORTATION COMMITTEE | Albany | NY | |
| CDH ENGINEERING | Bellevue | WA | |
| CELLA BARR ASSOCIATES | Phoenix | AZ | |
| CENTER FOR TRANSPORTATION RESEARCH | Blacksburg | VA | |
| CENTURY ENGINEERING | Overland Park | KS | |
| CH2M HILL | Chicago | IL | |
| CH2M-HILL | Bellevue | WA | |
| CHAMPAGNE ASSOCIATES | New Rochelle | NY | |
| CHARLES H. SELLS | Bedford Hills | NY | |
| CHARLOTTE COUNTY, FLORIDA | Punta Gorda | FL | |
| CHARLOTTE ENGINEERING | Port Charlotte | FL | |
| CHEMUNG COUNTY | Elmira | NY | |
| CHITTENDEN COUNTY | South Burlington | VT | |
| CHITTENDEN COUNTY REGIONAL PLANNING COMM. | Essex Junction | VT | |
| CHRISTOPHER BROWN & ASSOCIATES | Renton | WA | |
| CHURCH ENGINEERING | Irvine | CA | |
| CITY OF ALAMOGORDO | Alamogordo | NM | |
| CITY OF ALBUQUERQUE | Albuquerque | NM | |
| CITY OF ATLANTA | Atlanta | GA | |
| CITY OF AUBURN | Auburn | WA | |
| CITY OF BARTLESVILLE | Bartlesville | OK | |
| CITY OF BEAVERTON | Beaverton | OR | |
| CITY OF BELLEVUE | Bellevue | WA | |
| CITY OF BELLEVUE | Bellevue | WA | |
| CITY OF BELLEVUE | Bellevue | WA | |
| CITY OF BELLINGHAM | Bellingham | WA | |
| CITY OF BERKELEY | Berkeley | CA | |
| CITY OF BILLINGS | Billings | MT | |
| CITY OF BLAINE | Blaine | WA | |
| CITY OF BLUE SPRINGS | Blue Springs | MO | |
| CITY OF BOSTON | Boston | MA | |
| CITY OF BOTHELL | Bothell | WA | |
| CITY OF BURLINGTON | Burlington | VT | |
| CITY OF CAMPBELL | Campbell | CA | |
| CITY OF CHAMPAIGN | Champaign | IL | |
| CITY OF CHEYENNE | Cheyenne | WY | |
| CITY OF CHICO | Chico | CA | |
| CITY OF EAST LANSING | East Lansing | MI | |
| CITY OF ELKHART | Elkhart | IN | |
| CITY OF ELLENSBURG | Ellensburg | WA | |
| CITY OF ENGLEWOOD | Englewood | CO | |
| CITY OF ESPANOLA | Espanola | NM | |
| CITY OF EUGENE | Eugene | OR | |
| CITY OF EVERETT | Everett | WA | |
| CITY OF FEDERAL WAY | Federal Way | WA | |
| CITY OF FORT LAUDERDALE | Ft. Lauderdale | FL | |
| CITY OF GALLUP | Gallup | NM | |
| CITY OF GOLDSBORO | Goldsboro | NC | |
| CITY OF GRAND ISLAND | Grand Island | NE | |
| CITY OF HAMPTON | Hampton | VA | |
| CITY OF HILLSBORO | Hillsboro | OR | |
| CITY OF HOBBS | Hobbs | NM | |
| CITY OF HOLLISTER | Hollister | CA | |
| CITY OF HUNTSVILLE | Huntsville | AL | |
| CITY OF ISSAQUAH | Issaquah | WA | |
| CITY OF KANSAS CITY | Kansas City | MO | |
| CITY OF KEENE | Keene | NH | |
| CITY OF KENT | Kent | WA | |
| CITY OF KIRKLAND | Kirkland | WA | |
| CITY OF LAFAYETTE | Lafayette | LA | |
| CITY OF LAKEWOOD | Lakewood | CO | |
| CITY OF LAKEWOOD | Lakewood | OH | |
| CITY OF LANCASTER | Lancaster | CA | |
| CITY OF LARAMIE | Laramie | WY | |
| CITY OF LAS CRUCES | Las Cruces | NM | |
| CITY OF LENEXA | Lenexa | KS | |
| CITY OF LONGMONT | Longmont | CO | |
| CITY OF LYNNWOOD | Lynnwood | WA | |
| CITY OF MARYSVILLE | Marysville | WA | |
| CITY OF MEDFORD | Medford | OR | |
| CITY OF MILWAUKEE | Milwaukee | WI | |
| CITY OF MINOT | Minot | ND | |
| CITY OF NAPA | Napa | CA | |
| CITY OF NAPERVILLE | Naperville | IL | |
| CITY OF NAPERVILLE | Naperville | IL | |
| CITY OF NATIONAL CITY | National City | CA | |
| CITY OF OCEANSIDE | Oceanside | CA | |
| CITY OF OLATHE | Olathe | KS | |
| CITY OF OLYMPIA | Olympia | WA | |
| CITY OF ORLANDO | Orlando | FL | |
| CITY OF OVERLAND PARK | Overland Park | KS | |
| CITY OF PARK RIDGE | Park Ridge | IL | |
| CITY OF PHOENIX | Phoenix | AZ | |
| CITY OF PLANO | Plano | TX | |
| CITY OF PORTLAND | Portland | OR | |
| CITY OF POST FALLS | Post Falls | ID | |
| CITY OF PUYALLUP | Puyallup | WA | |
| CITY OF RAPID CITY | Rapid City | SD | |
| CITY OF REDMOND | Redmond | WA | |
| CITY OF RENTON | Renton | WA | |
| CITY OF RICHLAND | Richland | WA | |
| CITY OF RICHMOND | Richmond | VA | |
| CITY OF RIVERSIDE | Riverside | CA | |
| CITY OF ROCKFORD | Rockford | IL | |
| CITY OF ROCKLIN | Rocklin | CA | |
| CITY OF ROCKVILLE | Rockville | MD | |
| CITY OF ROSEVILLE | Roseville | CA | |
| CITY OF ROSWELL | Roswell | NM | |
| CITY OF SAN DIEGO | San Diego | CA | |
| CITY OF SAN LEANDRO | San Leandro | CA | |
| CITY OF SAN LUIS OBISPO | San Luis Obispo | CA | |
| CITY OF SAN RAFAEL | San Rafael | CA | |
| CITY OF SANTA BARBARA | Santa Barbara | CA | |
| CITY OF SANTA CRUZ - PUD | Santa Cruz | CA | |
| CITY OF SANTA FE | Santa Fe | NM | |
| CITY OF SCOTTSDALE | Scottsdale | AZ | |
| CITY OF SEATTLE | Seattle | WA | |
| CITY OF SHAFTER | Shafter | CA | |
| CITY OF SIERRA VISTA | Sierra Vista | AZ | |
| CITY OF SIMI VALLEY | Simi Valley | CA | |
| CITY OF SIOUX FALLS | Sioux Falls | SD | |
| CITY OF SOUTH BURLINGTON | South Burlington | VT | |
| CITY OF SPRINGFIELD | Springfield | OR | |
| CITY OF ST JOSEPH | St Joseph | MO | |
| CITY OF THOUSAND OAKS | Thousand Oaks | CA | |
| CITY OF TRACY | Tracy | CA | |
| CITY OF TUKWILA | Tukwila | WA | |
| CITY OF TUMWATER | Tumwater | WA | |
| CITY OF VICTORVILLE | Victorville | CA | |
| CITY OF WALTHAM | Waltham | MA | |
| CITY OF WATERTOWN | Watertown | SD | |
| CITY OF WEST SACRAMENTO | West Sacramento | CA | |
| CITY OF YAKIMA | Yakima | WA | |
| CITY PLANNING PROGRAM | Atlanta | GA | |
| CLARK COUNTY | Las Vegas | NV | |
| CLARK COUNTY PUBLIC SERVICES/PLANNING | Vancouver | WA | |
| CLOUGH HARBOUR & ASSOCIATES | Albany | NY | |
| COLE ASSOCIATES | South Bend | IN | |
| COLUMBUS-PHENIX CITY TRANSP. STUDY | Columbus | GA | |
| COMMUNITY SCIENCES CORP | Corrales | NM | |
| COUNCIL OF FRESNO COUNTY GOVTS | Fresno | CA | |
| COUNTY COUNCIL OF BEAUFORT CO. | Beaufort | SC | |
| COUNTY OF CHESTERFIELD | Chesterfield | VA | |
| COUNTY OF LOS ALAMOS | Los Alamos | NM | |
| COUNTY OF ONEIDA | Utica | NY | |
| COUNTY OF SAN LUIS OBISPO | San Luis Obispo | CA | |
| COUNTY OF SANTA BARBARA | Santa Barbara | CA | |
| COUNTY OF STAFFORD PLANNING DEPT. | Stafford | VA | |
| COWLITZ-WAHKIUKUM COUNCIL OF GOVERNMENTS | Kelso | WA | |
| CRAIN & ASSOCIATES, INC. | Menlo Park | CA | |
| CRANE - MCDOWELL& ASSOC. | Watertown | MN | |
| CRANE TRANSPORTATION | San Francisco | CA | |
| CRAWFORD, BUNTE, BRAMMEIER | St Louis | MO | |
| CREIGHTON MANNING ENGINEERING, LLP | Delmar | NY | |
| CRSS CONSTRUCTORS, INC | Denver | CO | |
| D.S. WINOKUR ASSOCIATES INC. | Newtown | PA | |
| DAMES AND MOORE | San Francisco | CA | |
| DAVE LARRABEE CONSULTING | Tucson | AZ | |
| DAVID E. WOOSTER & ASSOC., INC. | Pittsburgh | PA | |
| DAVID EVANS & ASSOCIATES | Portland | OR | |
| DAVID EVANS & ASSOCIATES, INC | Bellevue | WA | |
| DAVID EVANS & ASSOCIATES, INC. | Bellevue | WA | |
| DAVID KLINE & ASSOCIATES | Lynchburg | VA | |
| DAVID PLUMMER & ASSOC. | Coral Gables | FL | |
| DE SHAZO, STAREK & TANG INC. | Dallas | TX | |
| DEPARTMENT OF TRANSPORTATION | Vancouver | WA | |
| DESIGN REALTY | Holmden | NJ | |
| DKS ASSOCIATES | Oakland | CA | |
| DONALD J BERGMANN & ASSOCIATES | Rochester | NY | |
| DUPAGE COUNTY DEVELOPMENT DEPT. | Wheaton | IL | |
| DUPAGE COUNTY HIGHWAY DEPARTMENT | Wheaton | IL | |
| DUTCHESS COUNTY PLANNING DEPARTMENT | Poughkeepsie | NY | |
| EARTH TECH, INC. | Concord | MA | |
| EARTH TECH, INC. | Bellevue | WA | |
| EASTERN PLAINS COUNCIL OF GOVERNMENTS | Clovis | NM | |
| EBASCO ENVIRONMENTAL | Sacramento | CA | |
| EDWARDS AND KELCEY | Charlestown | MA | |
| ENGINEERING SOFTWARE APPLICATIONS | Belfair | WA | |
| ENTRANCO ENGINEERS INC. | Bellevue | WA | |
| ENVIRONMENTAL SCIENCE ASSOCIATES | Los Angeles | CA | |
| ENVIRONMENTAL SCIENCE ASSOCIATES | San Francisco | CA | |
| ERDMAN ANTHONY & ASSOCIATES | Rochester | NY | |
| EVERGREEN DRAFTING SERVICE | Wrightwood | CA | |
| FEDERAL HIGHWAY ADMINISTRATION | Washington | DC | |
| FEHR & PEERS ASSOCIATES | Lafayette | CA | |
| FELSBURG, HOLT & ULLEVIG | Englewood | CO | |
| FLORIDA A&M UNIVERSITY | Tallahassee | FL | |
| FREDERICK P. CLARK ASSOCIATES | Rye | NY | |
| G R PARROTT PE | Lynnwood | WA | |
| G. C. WALLACE, INC. | Las Vegas | NV | |
| G. C. WALLACE, INC. | Las Vegas | NV | |
| G.L. PANG & ASSOC. | Mountain View | CA | |
| GANNETT FLEMMING | Harrisburg | PA | |
| GARMEN ASSOCIATES | Montville | NJ | |
| GEE & JENSON | West Palm Beach | FL | |
| GENESEE TRANSPORTATION COUNCIL | Rochester | NY | |
| GEORGE BUTLER ASSOCIATES | Lenexa | KS | |
| GEORGE MASON UNIVERSITY | Fairfax | VA | |
| GEORGIA STATE UNIVERSITY | Atlanta | GA | |
| GEWALT- HAMILTON ASSOCIATES, INC. | Vernon Hills | IL | |
| GIBSON TRAFFIC CONSULTANTS | Everett | WA | |
| GRANITE STATE ENGINEERING SERVICES, INC. | Bedford | NH | |
| GREENHORNE & O'MARA, INC. | Greenbelt | MD | |
| GREENMAN PEDERSEN INC | Albany | NY | |
| GREENMAN PEDERSEN INC | Babylon | NY | |
| GREER & COMPANY | Anaheim | CA | |
| GREINER, INC. | Pleasanton | CA | |
| GREINER, INC. | Rocky Hill | CT | |
| GREINER, INC. | Tampa | FL | |
| GROUP MACKENZIE | Portland | OR | |
| H R G INC | Lancaster | PA | |
| H. W. LOCHNER, INC. | Bellevue | WA | |
| HARBOR ENGINEERS | Everett | WA | |
| HARLAND BARTHOLOMEW & ASSOCIATES | Memphis | TN | |
| HDR ENGINEERING, INC. | Bellevue | WA | |
| HEATH & ASSOCIATES | Puyallup | WA | |
| HENNINGSON-DURHAM & RICHARDSON | Omaha | NE | |
| HNTB Corporation | Kansas City | MO | |
| HOLDEN TRANSPORTATION ENGINEERING | Concord | NH | |
| HORNER & CANTER ASSOCIATES | Medford | NJ | |
| HOUSTON-GALVESTON AREA COUNCIL | Houston | TX | |
| HOWARD COUNTY - PLANNING & ZONING | Ellicott City | MD | |
| HOWARD NEEDLES TAMMEN & BERGENDOFF | Kansas City | MO | |
| HOWARD NEEDLES TAMMEN & BERGENDOFF | Bellevue | WA | |
| HT ASSOCIATES | Seattle | WA | |
| HUITT-ZOLLARS, INC. | Phoenix | AZ | |
| HUNTER COLLEGE | New York | NY | |
| HUNTER COLLEGE | New York | NY | |
| INLAND PACIFIC ENGINEERING | Spokane | WA | |
| INTEGRATED TRANSPORTATION SOLUTIONS | Columbia | MD | |
| IOWA STATE UNIVERSITY | Ames | IA | |
| ITHACA-TOMPKINS COUNTY | Ithaca | NY | |
| JACKSON & TULL | Washington | DC | |
| JAMES J. BENES ASSOCIATES, INC. | Naperville | IL | |
| JAMES T. RAPOLI, P.E. | Newburgh | NY | |
| JAMES W. SEIBERT & ASSOC. | Santa Fe | NM | |
| JAS CONSULTANTS, INC. | Dallas | TX | |
| JF DAVIDSON ASSOCIATES | Riverside | CA | |
| JHK & ASSOCIATES | San Francisco | CA | |
| JHK & ASSOCIATES | Berlin | CT | |
| JHK & ASSOCIATES | Alexandria | VA | |
| JHK & ASSOCIATES | Bellevue | WA | |
| JIM NAPOLEON & ASSOCIATES | Syracuse | NY | |
| JOHN COLLINS ENGINEERS | Hawthorne | NY | |
| JONES & STOKES ASSOCIATES | Sacramento | CA | |
| JONES ENGINEERS | Bellingham | WA | |
| JRH TRANSPORTATION ENGINEERING | Eugene | OR | |
| JUB ENGINEERS, INC. | Kennewick | WA | |
| JUSTIN FARMER TRANSPORTATION ENGINEERING | Fullerton | CA | |
| K2 & ASSOCIATES, INC. | Bothell | WA | |
| KANSAS STATE UNIVERSITY | Manhattan | KS | |
| KASK CONSULTANTS | Seattle | WA | |
| KASL CONSULTING ENGINEERS, INC. | Sacramento | CA | |
| KEECH ASSOCIATES | Portland | OR | |
| KEITH B. HIGGINS & ASSOC. | Gilroy | CA | |
| KELLER ASSOCIATES, INC. | Boise | ID | |
| KELLERCO, INC. | Leesburg | VA | |
| KEYSTONE CONSULTING ENGINEERS, INC. | Bethlehem | PA | |
| KIMLEY-HORN AND ASSC., INC. | Orange | CA | |
| KIMLEY-HORN ASSOC. | Orlando | FL | |
| KING COUNTY PUBLIC WORKS DEPARTMENT | Seattle | WA | |
| KING COUNTY PUBLIC WORKS DEPT | Seattle | WA | |
| KIRKHAM MICHAEL & ASSOCIATES | Omaha | NE | |
| KITTELSON & ASSOCIATES | Portland | OR | |
| KJS ASSOCIATES | Bellevue | WA | |
| LAKE COUNTY DIV. OF TRANSPORTATION | Libertyville | IL | |
| LAKES REGION PLANNING COMMISSION | Meredith | NH | |
| LAMOUREUX | Essex Junction | VT | |
| LANCASTER COUNTY PLANNING COMMISSION | Lancaster | PA | |
| LANGLEY & MCDONALD | Virginia Beach | VA | |
| LARKIN ASSOCIATES | Kansas City | MO | |
| LEA, ELLIOTT & MCGEAN INC. | Arlington | TX | |
| LEE ENGINEERING | Phoenix | AZ | |
| LEEDSHILL-HERKENHOFF, INC. | Albuquerque | NM | |
| LEIGH, SCOTT & CLEARY, INC. | Tahoe City | CA | |
| LEWIS COUNTY CENTRAL SERVICES | Chehalis | WA | |
| LINSCOTT, LAW & GREENSPAN | Pasadena | CA | |
| LOUIS BERGER & ASSOCIATES | East Orange | NJ | |
| LOVELL-SAUERLAND & ASSOCIATES, INC. | Lynnwood | WA | |
| LUMOS & ASSOCIATES | Carson City | NV | |
| MARICOPA COUNTY | Phoenix | AZ | |
| MARYLAND NTNL. CAPITOL PARKS & PLNNG COMM. | Silver Spring | MD | |
| MASON COUNTY | Shelton | WA | |
| MASSACHUSETTS INSTITUTE OF TECHNOLOGY | Cambridge | MA | |
| MAYES, SUDDETH AND ETHERIDGE, INC. | Marietta | GA | |
| MCDONALD, PROUDFOOT & ASSOCIATES | Toledo | OH | |
| MCMAHON AND ASSOCIATES | Willow Grove | PA | |
| MCTRANS CENTER | Gainesville | FL | |
| MEMPHIS STATE UNIVERSITY | Memphis | TN | |
| METRO TRANSPORTATION GROUP | Hanover Park | IL | |
| MIAMI VALLEY REGIONAL PLNNG COMMISSION | Dayton | OH | |
| MICHAEL MARIS ASSOCIATES | Hackensack | NJ | |
| MICHAEL R BIRDSALL & ASSOCIATES | Issaquah | WA | |
| MICHIGAN TECH UNIVERSITY | Houghton | MI | |
| MIDDLE RIO GRANDE COG | Albuquerque | NM | |
| MILWAUKEE COUNTY | Milwaukee | WI | |
| MINNESOTA DEPT OF TRANSPORTATION | Roseville | MN | |
| MINNESOTA DEPT. OF TRANSPORTATION | St. Paul | MN | |
| MONTGOMERY COUNTY | Rockville | MD | |
| MORELAND-ALTOBELLI ASSOCIATES, INC. | Atlanta | GA | |
| MTA INC | Chicago | IL | |
| N. ABEND | Wayland | MA | |
| NELSON & POPE | Melville | NY | |
| NELSON ENGINEERING, INC. | Long Beach | NJ | |
| NEW HAMPSHIRE DOT | Concord | NH | |
| NEW MEXICO HIGHWAY/TRANSPORTATION DEPT. | Santa Fe | NM | |
| NEW YORK STATE DOT | Albany | NY | |
| NEW YORK STATE DOT | Albany | NY | |
| NEW YORK STATE DOT | Binghamton | NY | |
| NEW YORK STATE DOT | Buffalo | NY | |
| NEW YORK STATE DOT | Hornell | NY | |
| NEW YORK STATE DOT | Poughkeepsie | NY | |
| NEW YORK STATE DOT | Rochester | NY | |
| NEW YORK STATE DOT | Syracuse | NY | |
| NEW YORK STATE DOT | Utica | NY | |
| NEW YORK STATE DOT | Watertown | NY | |
| NEWBURGH-ORANGE COUNTY TRANSPORTATION COUNCIL | Goshen | NY | |
| NICKLAUS ENGINEERING, INC. | Yuma | AZ | |
| NOLTE AND ASSOCIATES | San Jose | CA | |
| OHIO NORTHERN UNIVERSITY | Ada | OH | |
| OLD DOMINION UNIVERSITY | Norfolk | VA | |
| OLSSON ASSOCIATES | Lincoln | NE | |
| OMG | Seattle | WA | |
| OMNI-MEANS LTD. | Roseville | CA | |
| ORANGE COUNTY | Orlando | FL | |
| OREGON DEPARTMENT OF TRANSPORTATION | Bend | OR | |
| OREGON DEPT. OF TRANSPORTATION | Salem | OR | |
| OREGON STATE UNIVERSITY | Corvallis | OR | |
| OSTERGAARD-ROBINSON & ASSOCIATES | Everett | WA | |
| PARAMETRIX, INC. | Portland | OR | |
| PARAMETRIX, INC. | Sumner | WA | |
| PARSONS BRINCKERHOFF | San Francisco | CA | |
| PARSONS BRINCKERHOFF | Detroit | MI | |
| PARSONS BRINCKERHOFF | Portland | OR | |
| PARSONS TRANSPORTATION GROUP INC. | Buffalo | NY | |
| PARSONS, BRINCKERHOFF, QUADE & DOUGLAS | Tempe | AZ | |
| PARSONS, BRINCKERHOFF, QUADE & DOUGLAS | San Bernardino | CA | |
| PARSONS, BRINCKERHOFF, QUADE & DOUGLAS | Denver | CO | |
| PARSONS, BRINCKERHOFF, QUADE & DOUGLAS | Honolulu | HI | |
| PARSONS, BRINCKERHOFF, QUADE & DOUGLAS | Princeton | NJ | |
| PARSONS, BRINCKERHOFF, QUADE & DOUGLAS | Seattle | WA | |
| PATTON HARRIS RUST & ASSOCIATES PC | Chantilly | VA | |
| PBQ&D | Atlanta | GA | |
| PC-TRANS | Lawrence | KS | |
| PENFIELD & SMITH | Santa Barbara | CA | |
| PENNONI ASSOCIATES, INC. | Wilmington | DE | |
| PENNONI ASSOCIATES, INC. | Philadelphia | PA | |
| PERTEET ENGINEERING | Everett | WA | |
| PFLUM KLAUSMEIER & GEHRUM | Indianapolis | IN | |
| PRESNELL ASSOCIATES, INC. | Louisville | KY | |
| PRINCE WILLIAM COUNTY | Prince William | VA | |
| PRINGLE & ASSOCIATES | Laguna Hills | CA | |
| PUGET SOUND REGIONAL COUNCIL | Seattle | WA | |
| PURDUE UNIVERSITY | West Lafayette | IN | |
| Q. GRADY MINOR AND ASSOC., P.A. | Bonita Springs | FL | |
| R K H | Foster City | CA | |
| RAJAPPAN & MEYER | San Jose | CA | |
| RANPAC ENGINEERING | Temecula | CA | |
| RAO ASSOCIATES, INC | Seattle | WA | |
| REGIONAL TRANSPORTATION COMMISSION | Reno | NV | |
| REID MIDDLETON, INC. | Lynnwood | WA | |
| RENSSELAER POLYTECHNIC INSTITUTE | Troy | NY | |
| RESOURCE SYSTEMS GROUP | White River Junction | VT | |
| RESOURCES FOR THE FUTURE | Washington | DC | |
| RICHARD CAROTHERS ASSOCIATES | Seattle | WA | |
| RICK ENGINEERING | Phoenix | AZ | |
| ROBERT A. FOSNAUGH | Albuquerque | NM | |
| ROBERT BERNSTEIN INC PS | Seattle | WA | |
| ROBERT HUBENETTE PE | Redwood City | CA | |
| ROBERTS ENGINEERING | San Diego | CA | |
| ROCKINGHAM PLANNING COMMISSION | Exeter | NH | |
| RUMMEL KLEPPER AND KAHL | Baltimore | MD | |
| RUST ENVIRONMENTAL INFRASTRUCTURE | Birmingham | AL | |
| RUTGERS UNIVERSITY | New Brunswick | NJ | |
| SANTA CRUZ PLANNING COMMISSION | Santa Cruz | CA | |
| SANTA FE COUNTY | Santa Fe | NM | |
| SASAKI ASSOCIATES, INC. | Watertown | MA | |
| SCA ENGINEERING | Lacey | WA | |
| SCHOOR & NEY, INC. | Manalapan | NJ | |
| SEA CONSULTANTS, INC. | Rocky Hill | CT | |
| SEATTLE UNIVERSITY | Seattle | WA | |
| SHAFER, KLINE & WARREN, P.A. | Kansas City | MO | |
| SHELBY COUNTY ENGINEERS' DEPARTMENT | Memphis | TN | |
| SIGMA DEVELOPMENT CONS. | Las Vegas | NV | |
| SKAGIT COUNCIL OF GOVERNMENTS | Mount Vernon | WA | |
| SKAGIT COUNTY PUBLIC WORKS | Mt. Vernon | WA | |
| SNOHOMISH COUNTY | Everett | WA | |
| SOUTH DAKOTA DEPT. OF TRANSPORTATION | Pierre | SD | |
| SOUTH DAKOTA STATE UNIVERSITY | Brookings | SD | |
| SOUTHWEST TRAFFIC ENGINEERING, INC. | Las Vegas | NV | |
| SPOKANE COUNTY ENGINEERS | Spokane | WA | |
| SPOKANE REGIONAL TRANSPORTATION COUNCIL | Spokane | WA | |
| STARNES CONSULTING | Arlington | TX | |
| STATE OF ALASKA | Juneau | AK | |
| STATE OF KANSAS | Topeka | KS | |
| STORCH ASSOCIATES | Manchester | NH | |
| STRAFFORD REGIONAL | Dover | NH | |
| STREET TRAFFIC STUDIES | Gaithersburg | MD | |
| SUFFOLK COUNTY - DPW - TRAFFIC CONTROL | Yaphank | NY | |
| SUNYA - URBAN & REGIONAL PLANNING PROGRAM | Albany | NY | |
| SUPERIOR ENGINEERING SERVICES, INC. | Las Vegas | NV | |
| SW REGION PLANNING COMMISSION | Keene | NH | |
| SYRACUSE METROPOLITAN TRANS. COUNCIL | Syracuse | NY | |
| T. HOFFLANDER | Chandler | AZ | |
| TAMS CONSULTANTS INC | Boston | MA | |
| TAYLOR ENGINEERING, INC. | Spokane | WA | |
| TDA ILLINOIS, INC. | Galesburg | IL | |
| TDA, INC. | Seattle | WA | |
| THE SEAR-BROWN GROUP | Rochester | NY | |
| THE TAUBMAN COMPANY, INC. | Bloomfield Hills | MI | |
| THE TOWN OF SILVER CITY | Silver City | NM | |
| THE TRANSPO GROUP | Bellevue | WA | |
| THE UNIVERSITY OF CONNECTICUT | Storrs | CT | |
| THOMSON TRANSPORTATION ENGINEERS, INC. | Alameda | CA | |
| THURSTON REGIONAL PLANNING COUNCIL | Olympia | WA | |
| TJKM ENGINEERS | Pleasanton | CA | |
| TOM R. LANCASTER, P.E. | Portland | OR | |
| TOWN OF BARNSTABLE | Hyannis | MA | |
| TOWN OF BROOKHAVEN | Patchogue | NY | |
| TOWN OF CONWAY | Center Conway | NH | |
| TOWN OF EAST HARTFORD | East Hartford | CT | |
| TOWN OF LINCOLN | Lincoln | MA | |
| TOWN OF NEW HARTFORD | New Hartford | NY | |
| TOWN OF SIMSBURY | Simsbury | CT | |
| TRAFFIC CONSULTANTS, INC. | Austin | TX | |
| TRAFFIC ENGINEERING CONSULTANTS, INC. | Oklahoma City | OK | |
| TRAFFIC ENGINEERING SERVICES, INC. | Columbus | OH | |
| TRAFF-PRO CONSULTANTS | Wickliffe | OH | |
| TRANS/OP INC | Williston | VT | |
| TRANSPORTATION CONSULTING GROUP | Winter Park | FL | |
| TRANSPORTATION COORDINATING COMM. | Springfield | OH | |
| TRANSPORTATION ENGINEERING AND PLANNING | Santa Cruz | CA | |
| TRANSPORTATION PLANNING & ENGINEERING, INC | Bellevue | WA | |
| TRANSPORTATION RESOURCE GROUP | York | PA | |
| TRANSPORTATION SOLUTIONS INC | Redmond | WA | |
| TRANSYSTEMS CORPORATION | Kansas City | MO | |
| TRILINE ASSOCIATES, INC | McMurray | PA | |
| TRI-STATE SIGNAL, INC. | Waltham | MA | |
| TULANE UNIVERSITY | New Orleans | LA | |
| UNIVERSITY OF ALASKA | Fairbanks | AK | |
| UNIVERSITY OF CENTRAL FLORIDA | Orlando | FL | |
| UNIVERSITY OF IDAHO | Moscow | ID | |
| UNIVERSITY OF ILLINOIS | Champaign | IL | |
| UNIVERSITY OF ILLINOIS | Savoy | IL | |
| UNIVERSITY OF IOWA | Iowa City | IA | |
| UNIVERSITY OF IOWA | Iowa City | IA | |
| UNIVERSITY OF KENTUCKY | Lexington | KY | |
| UNIVERSITY OF MISSOURI-ROLLA | Rolla | MO | |
| UNIVERSITY OF NEBRASKA | Omaha | NE | |
| UNIVERSITY OF NORTH CAROLINA - CHARLOTTE | Charlotte | NC | |
| UNIVERSITY OF NORTH CAROLINA - CHARLOTTE | Charlotte | NC | |
| UNIVERSITY OF PUERTO RICO | Mayaguez | PR | |
| UNIVERSITY OF SCIENCE & TECHNOLOGY | Edmonds | WA | |
| UNIVERSITY OF WASHINGTON | Seattle | WA | |
| URBAN SYSTEMS ASSOCIATES INC | San Diego | CA | |
| URS CORPORATION | New York | NY | |
| URS CORPORATION | Seattle | WA | |
| UTE, INC. | Albuquerque | NM | |
| UVLS RPC | Lebanon | NH | |
| VANASSE HANGEN BRUSTLIN, INC. | Watertown | MA | |
| VANDERBILT UNIVERSITY | Nashville | TN | |
| VERMONT AGENCY OF TRANSPORTATION | Montpelier | VT | |
| VHL CONSULTING | Waynesboro | TN | |
| VILLAGE OF BOLINGBROOK | Bolingbrook | IL | |
| VILLAGE OF GURNEE | Gurnee | IL | |
| VILLAGE OF HOFFMAN ESTATES | Hoffman Estates | IL | |
| VILLAGE OF LISLE | Lisle | IL | |
| VILLAGE OF ORLAND PARK | Orland Park | IL | |
| VILLAGE OF SCHAUMBURG | Schaumburg | IL | |
| VILLANOVA UNIVERSITY | Villanova | PA | |
| VIRGINIA DEPT. OF HWYS. AND TRANS. | Richmond | VA | |
| VOLLMER ASSOCIATES | New York | NY | |
| VVCE, INC. | Victorville | CA | |
| W & H PACIFIC | Bellevue | WA | |
| W&H PACIFIC | Beaverton | OR | |
| WARREN COUNTY | Warrensburg | NY | |
| WASHINGTON COUNTY | Hillsboro | OR | |
| WASHINGTON METROPOLITAN AREA AUTHORITY | Washington | DC | |
| WASHINGTON STATE DEPT. OF TRANSPORTATION | Olympia | WA | |
| WASHINGTON STATE DEPT. OF TRANSPORTATION | Seattle | WA | |
| WASHINGTON STATE DEPT. OF TRANSPORTATION | Seattle | WA | |
| WASHINGTON STATE DEPT. OF TRANSPORTATION | Spokane | WA | |
| WASHINGTON STATE DEPT. OF TRANSPORTATION | Yakima | WA | |
| WASHINGTON STATE TRANSPORTATION CENTER | Seattle | WA | |
| WASHOE COUNTY | Reno | NV | |
| WAYNE T. VAN WAGONER & ASSOCIATES | Salt Lake City | UT | |
| WELLS & ASSOCIATES | Arlington | VA | |
| WEST VIRGINIA UNIVERSITY | Morgantown | WV | |
| WESTERN WASHINGTON UNIVERSITY | Bellingham | WA | |
| WESTINGHOUSE | Aiken | SC | |
| WESTON PRINGLE & ASSOCIATES | Laguna Hills | CA | |
| WHATCOM COUNTY COUNCIL OF GOVERNMENTS | Bellingham | WA | |
| WHATCOM COUNTY PUBLIC WORKS | Bellingham | WA | |
| WILLDAN ASSOCIATES | Anaheim | CA | |
| WILLDAN ASSOCIATES | Ventura | CA | |
| WILLIAM POPP ASSOCIATES | Bellevue | WA | |
| WILSON & COMPANY | Albuquerque | NM | |
| WISCONSIN DEPT. OF TRANSPORTATION | Madison | WI | |
| WSDOT | Wenatchee | WA | |
| YAKIMA COUNTY PUBLIC WORKS | Yakima | WA | |
| YAKIMA VALLEY CONFERENCE OF GOVTS | Yakima | WA | |
| YORK COUNTY | York | PA | |
| BANKSTOWN CITY COUNCIL | Bankstown | NSW | AUSTRALIA |
| CAMPBELLTOWN CITY COUNCIL | Campbelltown | NSW | AUSTRALIA |
| ERM MITCHELL McCOTTER | Crows Nest | NSW | AUSTRALIA |
| HORNSBY SHIRE COUNCIL | Hornsby | NSW | AUSTRALIA |
| MAITLAND CITY COUNCIL | Maitland | NSW | AUSTRALIA |
| MASSON & WILSON PTY, LTD. | Chatswood | NSW | AUSTRALIA |
| ROADS & TRAFFIC AUTHORITY OF NSW | Rosebery | NSW | AUSTRALIA |
| RUST PPK PTY, LTD. | Rhodes | NSW | AUSTRALIA |
| SINCLAIR KNIGHT MERZ | St. Leonards | NSW | AUSTRALIA |
| TAMWORTH CITY COUNCIL | Tamworth | NSW | AUSTRALIA |
| ULOTH AND ASSOCIATES PTY LTD | Perth | WA | AUSTRALIA |
| UNIVERSITY OF NEW SOUTH WALES | Kensington | NSW | AUSTRALIA |
| BC TRANSIT | Surrey | BC | CANADA |
| BRITISH COLUMBIA INSTITUTE OF TECHNOLOGY | Burnaby | BC | CANADA |
| CITY OF ABBOTSFORD | Abbotsford | BC | CANADA |
| CITY OF COLWOOD | Colwood | BC | CANADA |
| CITY OF COQUITLAM | Coquitlam | BC | CANADA |
| CITY OF ESTEVAN | Estevan | SK | CANADA |
| CITY OF ETOBICOKE | Etobicoke | ON | CANADA |
| CITY OF HAMILTON | Hamilton | ON | CANADA |
| CITY OF KELOWNA | Kelowna | BC | CANADA |
| CITY OF MEDICINE HAT | Medicine Hat | AB | CANADA |
| CITY OF NEPEAN | Nepean | ON | CANADA |
| CITY OF SASKATOON | Saskatoon | SK | CANADA |
| CITY OF ST. ALBERT | St Albert | AB | CANADA |
| CITY OF VANCOUVER | Vancouver | BC | CANADA |
| CITY OF VICTORIA | Victoria | BC | CANADA |
| CITY OF WHITEHORSE | Whitehorse | YT | CANADA |
| COLE, SHERMAN & ASSOCIATES | Thornhill | ON | CANADA |
| CORP. OF DISTRICT OF SURREY | Surrey | BC | CANADA |
| CORP. OF THE DISTRICT OF SAANICH | Victoria | BC | CANADA |
| COUNTY OF STRATHCONA | Sherwood Park | AB | CANADA |
| CREATIVE TRANSPORTATION SOLUTIONS | Burnaby | BC | CANADA |
| CUMMING-COCKBURN LTD | Waterloo | ON | CANADA |
| DELCAN CORPORATION | New Westminster | BC | CANADA |
| DELCAN CORPORATION | Ottawa | ON | CANADA |
| FENCO ENGINEERS INC | Willowdale | ON | CANADA |
| GMK TRANSPORTATION PLANNING & ENGR, LTD. | Victoria | BC | CANADA |
| HALIFAX REGIONAL MUNICIPALITY | Halifax | NS | CANADA |
| HAMILTON & ASSOCIATES CONSULTING LTD | Vancouver | BC | CANADA |
| IBI GROUP | Toronto | ON | CANADA |
| IMC CONSULTING GROUP INC | Cambridge | ON | CANADA |
| INFRASTRUCTURE SYSTEMS LTD. | Edmonton | AB | CANADA |
| INTERCAD SERVICES LTD | Vancouver | BC | CANADA |
| MCGILL UNIVERSITY | Montreal | PQ | CANADA |
| MINISTRY OF TRANSPORTATION | Downsview | ON | CANADA |
| MINISTRY OF TRANSPORTATION & HIGHWAYS | Burnaby | BC | CANADA |
| MINISTRY OF TRANSPORTATION & HIGHWAYS | Kamloops | BC | CANADA |
| MINISTRY OF TRANSPORTATION & HIGHWAYS | Nanaimo | BC | CANADA |
| MINISTRY OF TRANSPORTATION & HIGHWAYS | Prince George | BC | CANADA |
| MINISTRY OF TRANSPORTATION & HIGHWAYS | Victoria | BC | CANADA |
| MONTREAL AIRPORTS | Montreal | PQ | CANADA |
| N.D. LEA CONSULTANTS, LTD. | Vancouver | BC | CANADA |
| QUEEN'S UNIVERSITY | Kingston | ON | CANADA |
| R. E. WINTER & ASSOCS., LTD | Mississauga | ON | CANADA |
| REID CROWTHER & PARTNERS, LTD | Calgary | AB | CANADA |
| ROBINSON CONSULTANTS | Kanata | ON | CANADA |
| ROYAL MILITARY COLLEGE | Kingston | ON | CANADA |
| SASKATCHEWAN HIGHWAYS & TRANSPORTATION | Regina | SK | CANADA |
| STANLEY ASSOCIATES ENGINEERING LTD. | Victoria | BC | CANADA |
| STANLEY TRANSPORTAITON | Edmonton | AB | CANADA |
| STANLEY TRANSPORTATION | Edmonton | AB | CANADA |
| THE CORP OF THE CITY OF THUNDER BAY | Thunder Bay | ON | CANADA |
| THE PROCTOR AND REDFERN GROUP | Don Mills | ON | CANADA |
| TOWN OF NEW GLASGOW | New Glasgow | NS | CANADA |
| TOWNSHIP OF LANGLEY | Langley | BC | CANADA |
| UMA ENGINEERING LTD | Burnaby | BC | CANADA |
| UMA ENGINEERING LTD | Mississauga | ON | CANADA |
| UMA ENGINEERING LTD. | Winnipeg | MB | CANADA |
| UMA ENGINEERING, LTD | Burnaby | BC | CANADA |
| UNIVERSITY OF ALBERTA | Edmonton | AB | CANADA |
| UNIVERSITY OF CALGARY | Calgary | AB | CANADA |
| UNIVERSITY OF REGINA | Regina | SK | CANADA |
| UNIVERSITY OF SASKATCHEWAN - TRANSPORTATION CENTER | Saskatoon | SK | CANADA |
| URBAN SYSTEMS LTD. | Richmond | BC | CANADA |
| WARD CONSULTING GROUP | Vancouver | BC | CANADA |
| UNIVERSIDAD EAFIT | Medellin | COLOMBIA | |
| CONSEJO DE SEGURIDAD VIAL | San Jose | COSTA RICA | |
| INGENIEURBURO | Winnenden | DEUTSCHLAND | |
| CONTSA CIA. LTDA. | Quito | ECUADOR | |
| NATIONAL TECHNICAL UNIV. OF ATHENS | Athens | GREECE | |
| UNIVERSITY OF THESSALONIKI | Thessaloniki | GREECE | |
| PT CAKRA MANGGILINGAN JAYA | Jakarta | INDONESIA | |
| VIA VILLAERMOSA | Palermo | ITALY | |
| CHUNGBUK NATIONAL UNIVERSITY | Cheongju | Chungbuk | KOREA |
| PERUNDING ATUR SDN BHD | Damansara | Kuala Lumpur | MALAYSIA |
| MINISTRY OF HOUSING | Port Louis | MAURITIUS | |
| YANGON CITY & REGIONAL DEV. | Yangon | MYANMAR | |
| BARCLAY TRAFFIC PLANNING | Lower Hutt | NEW ZEALAND | |
| BECA CARTER HOLLINGS & FERNER LTD | Wellington | NEW ZEALAND | |
| MANUKAU CITY COUNCIL | Manukau City | NEW ZEALAND | |
| PALMERSTON NORTH CITY COUNCIL | Palmerston North | NEW ZEALAND | |
| TAURANGA DISTRICT COUNCIL | Tauranga | NEW ZEALAND | |
| THE HUTT CITY COUNCIL | Lower Hutt | NEW ZEALAND | |
| TRAFFIC DESIGN GROUP, INC. | Lower Hutt | NEW ZEALAND | |
| SINTEF CIVIL & ENV. ENGINEERING | Trondheim | NORWAY | |
| INFORMATICS | Makkah | SAUDI ARABIA | |
| KING FAHD UNIVERSITY OF PETROLEUM & MINERALS | Dharan | SAUDI ARABIA | |
| KING SAUD UNIVERSITY | Riyadh | SAUDI ARABIA | |
| NAPIER UNIVERSITY | Edinburgh | SCOTLAND | |
| LUND UNIVERSITYINSTITUTE FOR TRAFIKTEKNIK | S-22110 | LUND | SWEDEN |
| INGENIEUTBORO | CH 8126 Kusnacht | SWITZERLAND | |
| CHIANG MAI UNIVERSITY | Chiang Mai | THAILAND | |
| PRINCE OF SONGKLA UNIVERSITY | Hatyai | Songkhla | THAILAND |
| ING. IGOR COLMENARES, PERS. FIRMA | Bello Monte | Caracas | VENEZUELA |
| UWI TECHNOLOGY TRANSFER CENTER | St. Augustine | Trinidad & Tobago | WEST INDIES |
| UWI TECHNOLOGY TRANSFER CENTRE | St. Augustine | Trinidad & Tobago | WEST INDIES |
Last Updated on 4/13/98