From among the extensive literature on congestion pricing, below are selected studies and websites with useful information on the rationale for pricing, detailed case studies, and federal policy. The U.S. Federal Highway Administration in particular provides extensive educational resources for policy makers and the general public. 

CMAP, 2012. Congestion Pricing: An Analysis of the GO TO 2040 Major Capital Projects Report features detailed technical analysis based on CMAP computer modeling of congestion pricing for major expressway construction projects recommended by the GO TO 2040 comprehensive regional plan.

CMAP, 2012. Policy Updates blog: Economic Impacts of Express Toll Lanes in the Chicago Region.

CMAP, 2008. "Managed Lanes Strategy Paper." CMAP conducted extensive research in the planning process for GO TO 2040, the comprehensive regional plan for northeastern Illinois. One of the strategy reports focused on managed lanes.

Illinois Tollway and Wilbur Smith Associates, 2010. "Chicago Regional Congestion Pricing Study." This study identifies potential locations to implement congestion pricing on the Chicago region's expressway network and modeled the various impacts of pricing.  The report home page includes results from a survey of Tollway users.

U.S. Federal Highway Administration (FHWA), 2012.  "Priced Managed Lane Guide."  This is intended as a comprehensive source of collective experience gained from priced managed lanes implemented in the U.S. through 2012.

U.S. Federal Highway Administration (FHWA), 2009. "Transit and Congestion Pricing: A Primer." This document reviews the effect of congestion pricing on transit systems.

U.S. Federal Highway Administration (FHWA), 2008. "Income-Based Equity Impacts of Congestion Pricing: A Primer." This document discusses congestion pricing's impact on equity and cites evidence from several U.S. examples.

U.S. Federal Highway Administration (FHWA), 2008. "Technologies that Complement Congestion Pricing: A Primer." This document reviews common technologies that complement the implementation of congestion pricing.

U.S. Federal Highway Administration (FHWA), 2006. "Congestion Pricing – A Primer: Overview." This document provides a broad overview of the topic, answers frequently asked questions, discusses relevant federal policy, and reviews examples from the U.S. and abroad.

Federal Congestion Pricing Policy
U.S. Federal Highway Administration (FHWA), Tolling and Pricing Program. This website describes federal programs related to tolling and pricing, including congestion pricing programs.

National Cooperative Highway Research Program, Synthesis 377, 2008. "Compilation of Public Opinion Data on Tolls and Road Pricing." This report summarizes survey and focus group data from a variety of toll roads and projects across the country, including several examples of congestion pricing.

U.S. Federal Highway Administration (FHWA), 2008. "Congestion Pricing Pilot Program: Lessons Learned: Final Report." This document reviews the performance of several congestion pricing projects across the United States.

Chicago Reader, February 18, 2016: "Will Rauner's plan to widen the Stevenson ease congestion…"

Land Line Magazine, February 10, 2016: "Illinois governor calls for adding toll lanes on I-55"

CBS Local, ‎February 4, 2016:‎ "Governor Seeking To Add New Paid Lanes To Stevenson Expressway"

Chicago Daily Herald, February 4, 2016: Would you pay to go faster on I-55?

WLS-TV, February 4, 2016: "State to add 'managed lanes' to Stevenson Exy."

fox2now.com, December 8, 2015: "IDOT seeks comments on I-55 'managed lane' project"

Crain's Chicago Business, December 7, 2015: "The Stevenson, a toll road? IDOT wants to hear what you think"

Chicago Tribune op-ed, November 21, 2013:  "Putting the speed back in speedway"

WBEZ-FM news coverage, February 5, 2013: "Report: Chicago traffic is bad; leave early" and Afternoon Shift program.

NBC-TV news coverage, February 5, 2013: "Chicago Commute Among Country's Most Unreliable"

Daily Herald,  February 5, 2013: "Paying for express lane one route to avoiding gridlock"

Crain's Chicago Business op-ed, January 7, 2013: "Congestion pricing: An issue of competitiveness"

Chicago Tribune editorial, October 29, 2012: "Traffic Decongestant: Letting drivers pay to avoid delays"

CMAP press release, October 15, 2012: "Computer models show congestion pricing's benefits for metropolitan Chicago residents and region"

Chicago Tribune news column, October 15, 2012: "Would you pay to skip traffic?"

WGN-TV news coverage, October 15, 2012: "Proposed express toll lanes promise to cut commute -- for a price"

ABC-TV news coverage, October 15, 2012: "Plan would charge Chicago commuters to drive on faster express lanes"

FOX-TV news coverage, October 15, 2012: "The price to avoid traffic"

WBEZ-FM news coverage, October 15, 2012: "Transportation group has plan to solve Chicago's gridlock"

Chicago Magazine news coverage, October 15, 2012: "Congestion Pricing Works, and Why People Don't Like It"

Chicagoist news coverage, October 16, 2012: "Would you pay to use express lanes?"

Huffington Post news coverage, October 16, 2012: "Chicago Congestion Pricing Plan Unveiled: Could New Lanes Cut Commute Times?"