Where should this be implemented? 

GO TO 2040 strongly advocates the implementation of congestion pricing.  To help understand how it could work here in metropolitan Chicago, let's look at the new expressway construction projects recommended by the comprehensive regional plan.  These include two new facilities -- the Illinois Route 53 north extension and Illinois Route 120 bypass and the Elgin O'Hare Western Access -- plus new lanes on the I-90 Addams Tollway, the I-290 Eisenhower Expressway, and the I-55 Stevenson Expressway. 

The interactive map below briefly describes each project's congestion pricing factors.  It also includes projected results for morning peak travel periods, based on CMAP computer models.

Congestion pricing for new expressways or lanes tends to pose fewer challenges because it doesn't require conversion of existing lanes. Implementing it for existing roads would be more challenging, but it also might bring greater benefits – more congestion relief and bigger savings in travel time. In the future, our region should also consider congestion pricing for existing roads.