For example, in the UK, the tube lines were brought to a screeching halt because TFL wanted to take disciplinary action against a driver that failed a breatherliser test. (https://www.bbc.com/news/uk-england-london-31372269)
However the rest of these comments seem to suggest they do help individuals readily.
For example, in the UK, the tube lines were brought to a screeching halt because TFL wanted to take disciplinary action against a driver that failed a breatherliser test. (https://www.bbc.com/news/uk-england-london-31372269)