A preemptive shielding of the asshole, be it the use of duct tape or plaster, to prevent ass rapage in a bad neighborhood. It is called the Idaho roadblock because it was first implemented in Boise.
(n) May be created intentionally or unintentionally- two cars driving next to each other at the exact same speed, thus preventing you and other cars behind from passing. Unbelievably frustrating, especially when you have somewhere to be.
a cluster of vehicles on the freeway, one in each lane, all driving the same too-slow speed, that are impossible to pass because they are positioned nearly side by side