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» OKHighways.com 
Includes photographs, route guides, and focus pages covering Oklahoma City and Tulsa.
http://www.okhighways.com/
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» Oklahoma Department of Transportation
Provides departmental organization and contacts, aeronautic, highway, public transportation, railroad, and waterway information, contracts, proposals, and construction standards and specifications as well as public service information and links to related
http://www.okladot.state.ok.us/
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» Oklahoma Highway History
Includes relevant information on bridges and U.S.-numbered routes.
http://www.wkinsler.com/highways/
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» Oklahoma Turnpike Authority
Provides organizational history and background information, turnpike maps, engineering drawings, and extension information, toll collection reports, and information and contacts for the PikePass automated toll collection system.
http://www.pikepass.com/
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