There's several other causes of death in owls.
Roadsides are just the most obvious locations to find/see dead ones.
I would imagine that a vehicle with 'full beam' lights on would pose more of a threat/problem to a hunting owl. I allways 'dip' my lights as soon as i see one.
Thats an interesting point about the 'small top corner lights' ......
You can imagine the owl wheeling away from the glare of the headlights only to get clattered by the rest of the cab/windscreen.
I'm glad my Transit is fully equipped with "owl-saver top corner lights"
Barn owls allways appear to have a death wish & shoot out low at right angles.
I'd dread to run an owl over, but have come close some nights.
On one occasion around new year time we were out driving slowly, 'owling' in Vauxaul Astra van when a Long eared left its perch in front of us, within a second
there was a thud....
After sliding to a halt in 2" of fresh snow, we got out to pick up the casualty but there was nothing to be seen, not even a feather!
I still think it was trying to land on the ladder rack, but misjudged it !!
Anyway, thats the closest ive come to an owl accident.....hope it stays that way.
Stevie.