Saw a TV program a while back ... can't remember too much about it though
.. was about a spot with high incidence of deer strikes and how whoever was trying to improve the problem went about it. This was a spot where deer regularly crossed the road, they built an underpass with fencing to try to point the deer in the direction of underpass and cleared all vegitation back from the side of the road for about 10 feet, think there was some other measures taken (believe they tried whistles attached to vehicles) ... but It's been a pretty brain intensive day and the poor thing needs a rest. Mrs Zippo saw it too I'll ask if she can remember a bit more.
There are some light up signs I know of on the A82, one at Glencoe ski centre going south, one at Kingshouse hotel going north, one at Bridge of Orchy going north (I think), don't know if they do any good though. So far since the start of September I've seen 4 dead deer at side of road .. no use to me I'm a veggie
Yup I know well that deer can and do appear from nowhere, happened to me twice, not hit one yet though .. touch wood! Vigilance isn't enough to guarantee avoiding them, it's one of those "problems of reasonable existence".
Clearing vegitation at roadsides might help to dimish the "appear from nowhere" type incidents, though probably require to be done over huge number of miles and therefore 'orribly expensive.
If I see deer at the roadside and there are other vehicles in sight I put my hazards on for a few seconds, don't know if it does any good or if folks just think I'm a looney .. but I do it anyway, can't see it doing any harm?