Bermie they cut down the small stuff just to save money later so it doesn't get any bigger. Also there might be alot of fast growing weed trees that will cause interference quicker then the pruning cycle will allow. I know if it is small and in the ROW it depends what it is if it comes out.
Don't hate the guys out there doing the work, hate the guy behind the desk telling them all what to do.
I totally agree with you on the guys out doing the work, they work hard, out all day in the heat breathing fumes and risking their lives on the side of the road, they've been told to do it, not necessarily their fault.
I suppose you'd have to see what goes on here, on our north shore there are miles of Tamarisk (sea spruce) that were planted for windbreaks and the power lines are above them. Now, they go out on a three to four month cycle and absolutely hammer these shrubs back with machetes. With the amount of regrowth being all soft herbaceous sprouts, all they would need to do is use a hedge trimmer to keep it under control, that would be quicker, and save time AND money.
Also any palms in the area whether or not thay are anywhere near the verge or in danger of getting near the power lines in the next ten years are stripped of all leaves bar two or three around the heart.
A lot of the roadside groundcover, is soft herbaceous stuff, aspargus fern, nasturtiums, seaside goldenrod, sea-ox-eye, turnera, weedelia, all small soft stuff that gets 'pruned' by passing vehicles, and is never a problem. This vegetation actually has the effect of suppressing invasion by the fast growing woody trees and shrubs and more noxious weeds, but they hoe it off completely and then every 3 months they spray it with roundup. I've watched some verges turn into little deserts, coated only by sick looking moss, or gradually erode into sand pits, instead of soft tumbling vegetation that harms no-one.
You may have guessed its a bit of a pet peeve of mine. The Parks Department tries to liase with them but their protests seem to fall on deaf ears!
OK enough of a rant from me. Peace and Love