rolling roadblock 

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

Louie hated rolling roadblocks until one saved him from a speed trap.

rolling roadblock by LaLaLander17 March 2, 2009

rolling road-block 

When a person deceids to stay in the fast lane on the highway and gets passed constantly by other drivers.

Jonathan get the fuck over in the slow lane, you are being a rolling road-block..

rolling road-block by wife101903 November 25, 2011

rollin roadblock 

When big rigs are parallel on all lanes on an interstate, and no one can pass

what assholes, these semis are a rollin roadblock!

rollin roadblock by wonafuneral September 29, 2023