The official site of the department. Includes information on construction projects and information about doing business with the department.

Information on the system, including the I-Pass electronic toll collection system.

Contains resources related to this scenic drive around the lake.

Official site of the company that now leases the toll route in southeast Chicago. Site includes history and toll information.

Environmental Law and Policy Center of the Midwest site against construction of new tollways (and other out of state highways).

Organization promoting this scenic route in Fulton County which was the setting of Edgar Lee Master's "Spoon River Anthology". Contains maps and other information.

Entry from the Encyclopedia of Chicago. Gives historic background and includes a map.

Aaron Renn's information and opinions on Chicago area commuting.

A guide to the origin and evolution of the numbered system. Includes route logs and other trivia.

Weblog about the proposed facility south of Chicago.