And as for drunken driving ! The last fatal rail accident caused by the driver drinking was IIRC▸ over 50 years ago (Hither green) Happens all the time on the roads.
Hither Green in 1967 was a broken rail. Eltham Well Hall in 1972 was a drunk train driver.
52 years to the day since the Eltham Well Hall "accident" and I have, after thought, added this thread to the "historic" board as something that would not happen today. But a reminder of the need for systems to be in place to be vigilant, jut in case a safety-critical member of staff (or one who can endanger safety) goes - err - off the rails.
Despite the well published policy on random D&A testing, which takes place across offices, depots, control centres, work sit access etc. post incident testing, the pre employment D&A testing and the regular testing at medicals; there are still people testing positive.
Having said that the number is extremely low, there are not many industries that have the legal requirement to conduct regular random D&A testing