I always though that the powers in and around Chicago had maps where they figured out ways that drivers might get around construction closures so they can block those, too.
You knew it couldn't be mere incompetence, right?
New Virginia Toll Lanes Designed to Create Congestion
Illegal political donations helped give Australian company full control over Virginia transportation until the year 2087.
...
In June, the US Department of Transportation created a first-of-its-kind $1.6 billion financing package that consisted of tax-free bonds, loans and state taxpayer grants to support the project that will add a pair of High Occupancy Toll (HOT) lanes to the Interstate 495 Capital Beltway just outside of Washington, DC. To this amount, Transurban only added $349 million of its own capital -- less than the cost of interest -- toward the construction of the toll lanes (details).
In return for that small investment, Transurban received from Virginia officials the right to demand payment from state taxpayers any time that improvements are made to a number of free roads near the Beltway. In effect, the contract between the Virginia Department of Transportation (VDOT) and Transurban is designed to ensure the area remains sufficiently congested so that motorists will have an incentive to pay to use the toll lanes.
http://www.thenewspaper.com/news/24/2458.asp
You knew it couldn't be mere incompetence, right?