Pete Bigelow, «Tracy Morgan Crash Sparks Another Debate over Tired Truckers,» Autoblog, June 9, 2014, http://www.autoblog.com.
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Jon Hilkevitch, «Federal Traffic Agency Targets Drowsy Driving,» Chicago Tribune, March 16, 2015, http://www.chicagotribune.com.
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«Sen. Collins Secures Critical Investments in Transportation Infrastructure and Housing,» Susan Collins, United States Senator for Maine, press release, December 10, 2014, http://www.collins.senate.gov.
