Selby driver was a Gary hart who had been up all day chatting on his phone to a lady he met on the internet, then fell asleep and went down the embankment at great Heck, 6 killed 44 injured at the end of it all.
the law changed in its wake requiring vehicles and trailers with a maximum authorised mass over 3.5 ton to keep records by means of a tachograph.
round about the same time the raf reviewed shift patterns for folks finishing long duties and driving home as I think it was about 20 where lost in the one year falling asleep behind the wheel on the way home, one was a chef who was a good mate who was only going home from honington to thetford at the time and came of the road at barnham bends.
some of the rules are good in this respect, I can remember regiment squadrons doing direct drives to tain range doing exercises and coming back without sleep that was complete madness, it was good that option was removed from there commanders hands. Plus losing a rapier tracking head on route and not knowing where didn't help either !
i think it's more common sense to do it on a case by case basis, flight back from the Falklands if you can't be anything but fecked, you need picking up or a kip before you drive and the traffic seems a lot quicker than the 30mph the previous six months have been.
circumstance should be the rule !