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Updated 8:00 AM EST, November 12, 2008
 Freeway Management Operating Road Weather Management Systems (RWIS)
2004 National Summary
| Number of Metropolitan Areas |
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| Surveyed / Returned Survey | Operating RWIS |
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| 106 / 100 | 59 |
2004 Metropolitan Summary
| Metropolitan Area | State | Number of Agencies |
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| Surveyed / Returned Survey | Operating RWIS |
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| Albany, Schenectady, Troy | NY | 2 / 2 | 1 | | Allentown, Bethlehem, Easton | PA | 2 / 2 | 1 | | Atlanta | GA | 1 / 1 | 1 | | Bakersfield | CA | 1 / 1 | 1 | | Baltimore | MD | 1 / 1 | 1 | | Beaumont-Port Arthur | TX | 1 / 1 | 1 | | Bellingham | WA | 1 / 1 | 1 | | Boise City | ID | 1 / 1 | 1 | | Boston, Lawrence, Salem | MA | 1 / 1 | 1 | | Buffalo, Niagara Falls | NY | 2 / 2 | 1 | | Chattanooga | TN | 1 / 1 | 1 | | Chicago, Gary, Lake County | IL | 4 / 4 | 3 | | Cleveland, Akron, Lorain | OH | 3 / 3 | 2 | | Columbia | SC | 1 / 1 | 1 | | Columbus | OH | 1 / 1 | 1 | | Dallas, Fort Worth | TX | 2 / 2 | 1 | | Dayton, Springfield | OH | 1 / 1 | 1 | | Denver, Boulder | CO | 1 / 1 | 1 | | Des Moines | IA | 1 / 1 | 1 | | El Paso | TX | 1 / 1 | 1 | | Fresno | CA | 1 / 1 | 1 | | Grand Rapids | MI | 1 / 1 | 1 | | Hampton Roads | VA | 1 / 1 | 1 | | Harrisburg, Lebanon, Carlisle | PA | 2 / 2 | 1 | | Houston, Galveston, Brazoria | TX | 1 / 1 | 1 | | Indianapolis | IN | 1 / 1 | 1 | | Jacksonville | FL | 1 / 1 | 1 | | Janesville-Beloit | WI | 1 / 1 | 1 | | Kansas City | MO | 2 / 2 | 2 | | Knoxville | TN | 1 / 1 | 1 | | Los Angeles, Anaheim, Riverside | CA | 3 / 3 | 2 | | Louisville | KY | 1 / 1 | 1 | | Minneapolis, St. Paul | MN | 1 / 1 | 1 | | Nashville | TN | 1 / 1 | 1 | | New London | CT | 1 / 1 | 1 | | New Orleans | LA | 2 / 2 | 1 | | New York, Northern New Jersey, Southwestern Connecticut | NY | 11 / 9 | 4 | | Philadelphia, Wilmington, Trenton | PA | 6 / 6 | 4 | | Phoenix | AZ | 1 / 1 | 1 | | Pittsburgh, Beaver Valley | PA | 2 / 2 | 2 | | Portland, Vancouver | OR | 1 / 1 | 1 | | Providence, Pawtucket, Fall River | RI | 1 / 1 | 1 | | Provo - Orem | UT | 1 / 1 | 1 | | Richmond, Petersburg | VA | 1 / 1 | 1 | | Roanoke | VA | 1 / 1 | 1 | | Rochester | NY | 1 / 1 | 1 | | Salt Lake City, Ogden | UT | 2 / 2 | 2 | | San Antonio | TX | 1 / 1 | 1 | | Scranton, Wilkes-Barre | PA | 2 / 2 | 2 | | Seattle, Tacoma | WA | 2 / 2 | 2 | | Spokane | WA | 1 / 1 | 1 | | Springfield | MA | 1 / 1 | 1 | | St. Louis | MO | 2 / 2 | 2 | | Stockton | CA | 1 / 1 | 1 | | Syracuse | NY | 2 / 2 | 1 | | Toledo | OH | 2 / 2 | 1 | | Tulsa | OK | 1 / 1 | 1 | | Wichita | KS | 1 / 1 | 1 | | Youngstown, Warren | OH | 1 / 1 | 1 | | 59 Metropolitan Areas |
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