seeing power lines is a required skill to be learned. A correct type
of light is required and glare is critically an issue.
A speed of less than 80 knots allows easy sight and so if the small
power line is visible
it is like landing an aircraft.
So the rather hard part is training people for low level flight. And
so the nice clean window is also required.
The worst to see are small noncommercial lines, private power lines
crossing the river or highway. A poor tree line visibility is assured
because there is no cutt woods to see!
No pole either, the line just appears out of the woods alongside the
road.
All in all it is better to clear the highway at 100 feet then retrace
the route at 20 feet.
HECTOP wrote:
Missed me, eh? Just got permission from my friends to publish this video of
them (stupid idiots!) buzing a highway just outside of Moscow, Russia in a
PZL Wilga-35 along with their wives(!) on the backseat 
http://hectop.livejournal.com/281702.html
Yours truly
HECTOP
PP-ASEL-IA
http://www.maxho.com
maxho_at_maxho.com