A surprise police roadblock to test drivers for alcohol consumption. The “bus” refers to the large vehicle police use at the roadblocks. Initial questioning of those who register a blood alohol content above the legal limit takes place within the bus.
Breathalyzer test checkpoint.
Booze bus-usage examples
|If you drink and drive, I hope you get caught by the booze bus.
|If you drive under the influence, I hope the cops catch you at a breathalyzer test checkpoint.