It's probably quite easy to do - driving different trailers, etc..
There used to be a light-beam device* on the approach to the Mountrath Road bridge in Portlaoise that lit up a sign on the bridge if you were high enough to break the beam. I'm not sure if it's still there. The one good thing about that bridge is that it's not square to the road, thus softening the blow a bit, and the angle tends to roll things away from the oncoming traffic, as in the picture above, it would be even more exciting if it was the other way..
There's even a video on YouTube of a chap hitting a bridge after forgetting to lower the tipper body..
*This - https://maps.google.co.uk/maps?q=portlaoise&hl=en&ll=53.033776,-7.304114&spn=0.00135,0.002411&hnear=Portlaoise,+County+Laois,+Ireland&t=h&z=19&layer=c&cbll=53.033774,-7.303907&panoid=HQyY3gXRsyliIHt9-zFiOg&cbp=12,200.3,,1,-11.06 - doesn't look how I remember it, maybe they've installed a new one, but there doesn't seem to be the lit sign on the bridge** now..
**Ah, there it is - https://maps.google.co.uk/maps?q=portlaoise&hl=en&ll=53.033802,-7.305688&spn=0.00135,0.002411&hnear=Portlaoise,+County+Laois,+Ireland&t=h&layer=c&cbll=53.033806,-7.305836&panoid=gJZTOgQQnF-Vr3b8yy6zKw&cbp=12,209.96,,2,-3.85&z=19 - before you get to the bridge..