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Illinois State Toll Highway Authority (December 17, 2009). "2010 Budget"(PDF). Illinois State Toll Highway Authority. p. 39. Archived from the original(PDF) on March 26, 2010. Retrieved December 31, 2009.
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Illinois State Toll Highway Authority (December 17, 2009). "2010 Budget"(PDF). Illinois State Toll Highway Authority. p. 93. Archived from the original(PDF) on March 26, 2010. Retrieved December 31, 2009.
Illinois State Toll Highway Authority. "Congestion-Relief Program". Illinois State Toll Highway Authority. Archived from the original on October 25, 2009. Retrieved November 12, 2009.
Illinois State Toll Highway Authority. "Projects by Roadway". Illinois State Toll Highway Authority. Archived from the original on October 22, 2009. Retrieved November 12, 2009.
Illinois State Toll Highway Authority (December 17, 2009). "2010 Budget"(PDF). Illinois State Toll Highway Authority. p. 104. Archived from the original(PDF) on March 26, 2010. Retrieved December 31, 2009.
Illinois State Toll Highway Authority. "Capital Program Overview"(PDF). Move Illinois: The Illinois Tollway Driving the Future. Illinois State Toll Highway Authority. Archived from the original(PDF) on May 22, 2013. Retrieved July 3, 2014.
Illinois State Toll Highway Authority (December 17, 2009). "2010 Budget"(PDF). Illinois State Toll Highway Authority. p. 107. Archived from the original(PDF) on March 26, 2010. Retrieved December 31, 2009.
Illinois State Toll Highway Authority (December 17, 2009). "2010 Budget"(PDF). Illinois State Toll Highway Authority. p. 19. Archived from the original(PDF) on March 26, 2010. Retrieved November 24, 2013.
Illinois State Toll Highway Authority (December 17, 2009). "2010 Budget"(PDF). Illinois State Toll Highway Authority. pp. 20, 72. Archived from the original(PDF) on March 26, 2010. Retrieved December 31, 2009.
Illinois State Toll Highway Authority. "Help Trucks & *999". Illinois State Toll Highway Authority. Archived from the original on February 20, 2010. Retrieved December 31, 2009.
Illinois State Toll Highway Authority (December 17, 2009). "2010 Budget"(PDF). Illinois State Toll Highway Authority. p. 24. Archived from the original(PDF) on March 26, 2010. Retrieved January 9, 2010.
Illinois State Toll Highway Authority. "How Toll Rates Were Established"(PDF). Illinois State Toll Highway Authority. Archived from the original(PDF) on December 27, 2009. Retrieved January 9, 2010.
Illinois State Toll Highway Authority. "Facts, Figures & History". Illinois State Toll Highway Authority. Archived from the original on February 21, 2010. Retrieved January 11, 2010.
Illinois State Toll Highway Authority. "I-Pass Assist". Illinois State Toll Highway Authority. Archived from the original on October 18, 2009. Retrieved January 15, 2010.
Illinois State Toll Highway Authority. "About I-Pass". Illinois State Toll Highway Authority. Archived from the original on January 15, 2010. Retrieved January 12, 2010.